A car is driving at 35 m/s. It decides to accelerate at 4.5 m/s2 for 3 seconds. How fast is it now moving?
Please show work even if you are an online student. I know it takes time, but I promise it is worth it.
I have included the units in the answer already. Please only put the number round all answers to 2 decimal places
if possible.
final velocity =
m/s
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6
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Answers
Answer:
48.5
Explanation:
vf = vi + at
vf = 35 + 4.5(3)
vf = 35 + 13.5
vf = 48.5 m/s
Related Questions
a small object is placed between two plane mirrors inclined at an angle of 60° to each other in a dark room how many images are seen explain
Answers
Answer:
nothing
Explanation:
bocouse of darkness
Why are scientists currently debating on whether viruses are alive or not?
I NEED AN ANSWER ASAP!!!!
Answers
They are because they don't know if viruses are alive and have a mind of its own or its just humans spreading it all around. Another reason is if they do find out they are alive or not they need to find solutions to kill them or to slow/stop the spreading.
A man is trying to push a 250 N dresser across his carpeted bedroom. He applies a force of 20 N and the carpet provides a frictional force of 8N. Which vectors represented in the diagram below will you need to consider and what will be the resulting net force?
Answers
Answer:
The correct option is;
B. Subtract vectors A from C; \(F_{Net}\) = 12 N
Explanation:
The given parameters are;
The weight of the dresser = 250 N
The force applied by the man = 20 N = C
The frictional force provided by the carpet = 8 N = The component of the weight resisting motion = A
Therefore, the net force tending to put the dresser in motion, \(F_{Net}\), is given as follows;
\(F_{Net}\) = The force applied by the man, C - The frictional force provided by the carpet which is the component of the weight resisting motion, A
\(F_{Net}\) = C - A = 20 N - 8 N = 12 N
\(F_{Net}\) = 12 N
The resulting net force, \(F_{Net}\) = 12 N.
The resultant force can be obtained by subtracting vector C from Vector A and the value of net force is 12 N. Hence, option (C) is correct.
Given data:
The weight of man is, W = 250 N.
The magnitude of applied force is, F = 20 N.
The magnitude of frictional force is, f = 8 N.
As per the given problem and the diagram let the applied force be denoted by vector A, Then,
Magnitude of Vector A = 20 N
And the frictional force be denoted by vector C. Then,
Magnitude of Vector C = 8 N
We know that the role of frictional force is to oppose the motion or to oppose the effect of applied force. Then the resultant force is given as,
\(F_{net} = F-f\\\\F_{net} = 20 - 8\\\\F_{net} = 12 \;\rm N\)
Thus, we can conclude that the resultant force can be obtained by subtracting vector C from Vector A and the value of net force is 12 N. Hence, option (C) is correct.
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Cindy runs 2 kilometers every morning. She takes 2 minutes for the first 250 meters, 4 minutes for the next 1,000 meters, 1 minute for the next 350 meters, and 3 minutes for the rest.
Cindy’s average speed for the entire run is
meters per minute. One kilometer is the same as 1,000 meters.
Answers
Answer:
200 m / min
Explanation:
Total distance = 2000 m
Total time = 2+4+1+3 = 10 minutes
Average speed = 2000 m / 10 min = 200 m/min
A rock falls off a cliff and hits the ground after three seconds. The rock's velocity is 29.4 m/s when it hits the ground. What is its acceleration of the rock in the downward direction?
Answers
Answer:
formula for acceleration= (final velocity - starting velocity)/ time elapsed
if the starting velocity was 0 m/s
if the final velocity is 29.4 m/s
time elapsed is 3 seconds
then a =(29.4-0)/3
=9.8 m/s^2
Explanation: sorry for the late answer
a block attached to the lower end of a vertical spring oscillates up and down. if the spring obeys hooke's laws, the period of oscillation depends on which of the following
Answers
The period of oscillation of a block attached to a vertical spring depends on the mass of the block and the force constant of the spring.So option ii and iii is correct.
The period of oscillation of a block attached to the lower end of a vertical spring that obeys Hooke's law depends on the following factors:
I. Mass of the block: The period of oscillation is directly proportional to the square root of the mass of the block. Heavier blocks will have a longer period of oscillation.
II. Amplitude of oscillation: The period of oscillation is independent of the amplitude. It means that the period remains the same regardless of how far the block is displaced from its equilibrium position.
III. Force constant of the spring: The period of oscillation is inversely proportional to the square root of the force constant of the spring. A stiffer spring with a higher force constant will result in a shorter period of oscillation.
In summary, the period of oscillation of a block attached to a vertical spring depends on the mass of the block and the force constant of the spring. It is directly proportional to the square root of the mass and inversely proportional to the square root of the force constant. The amplitude of oscillation does not affect the period.
Therefore option ii and iii is correct.
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Drag the labels to the image. Each label can be used more than once.
The image shows the path of a ball from the time it's thrown to the time it lands on the ground. Determine the kind of energy the ball has at each
position. (PE stands for gravitational potential energy, and KE stands for kinetic energy.)
Answers
Following the image of the ball that have been shown;
1. Potential energy
2. Kinetic energy
3. Kinetic energy
4. Potential energy
5. Kinetic energy
6. Kinetic energy
7. Kinetic energy
What is the type of energy?
Due to its position or elevation, an object has potential energy while it is at rest or is elevated above the ground. Depending on the circumstances, this potential energy may either be elastic or gravitational.
Kinetic energy, or the energy connected to motion, is present when an item is in motion. An object's kinetic energy is determined by its mass and velocity .
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Answer:
1: Potential and kinetic
2: Potential and kinetic
3: Potential and kinetic
4: potential
5: Potential and kinetic
6: Potential and kinetic
7: NEITHER
Explanation:
4 is potential because its the highest point
7 is neither because the question states "the image shows the path of a ball from the time it's thrown to the time it lands on the ground" so... 7 is when the ball has landed on the ground. therefore it has neither potential nor kinetic because it is resting.
A bus starting from a speed of 24 m/s slows to 6 m/s in a time of 3 s. The acceleration of the bus in meters per second squared is *
Answers
The acceleration of the bus for the given velocities and time of motion is 6 m/s².
The given parameters;
Initial speed of the bus, u = 24 m/sFinal sped of the bus, v = 6 m/sTime of motion of the bus, t = 3 sAcceleration is defined as the time rate of change of velocity.
Acceleration can be uniform if the change in velocity occurs at equal time interval.
The acceleration of the bus for the given velocities and time of motion is calculated as;
\(a = \frac{v-u}{t} \\\\a = \frac{24-6}{3} \\\\a = 6 \ m/s^2\)
Thus, the acceleration of the bus for the given velocities and time of motion is 6 m/s².
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a crane lifts a load from rest up to the top of a tower and gently sets it down. match the description on the right with the work done on the left.
Answers
The work done by the crane on the load is positive. As the load was initially at rest, the crane had to apply a force greater than the weight of the load to lift it up against gravity. This means that the crane did work on the load by transferring energy to it in the form of gravitational potential energy.
The work done is equal to the product of the force applied by the crane and the distance over which the force was applied.
Once the load reaches the top of the tower, the work done on the load is zero. This is because the load is no longer moving and is not experiencing any change in potential energy or kinetic energy. The crane is also not applying any force on the load at this point.
As the crane gently sets the load down, the work done on the load is negative. The crane is applying a force that is less than the weight of the load, and the load is moving in the opposite direction to its initial motion. This means that the crane is transferring energy out of the load, resulting in a decrease in the load's potential energy. The work done is equal to the product of the force applied by the crane and the distance over which the force was applied, which is in the opposite direction to the direction of motion.
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What patterns did you notice when comparing the interactions between the tape and van de Graaff generator to the tape and charged balloon?
Answers
The negatively charged van de Graff generator can make a flow of electrons through the tape and these both will repel each other. When the tape comes in contact with the balloon, the positive charges of balloon gets attracted and they stick together.
What is van de Graff generator?Electrons are drawn from the earth by a Van de Graaff generator, transported via a belt, and then stored on the big sphere. These electrons are attracted to one another and try to distance themselves from one another by dispersing throughout the surface of the sphere.
Electrons can spread out widely on the earth, thus they will choose the shortest route possible to return to the ground. The electrons from the tape repel the electron from the tape, make the tape negatively charged.
This negatively charged tape when comes in contact with the balloon, it will polarize the balloon and its positive charges aligns with the tape's charge and gets stuck.
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Which statements correctly identify chart of Earth and Jupiter?
Answers
Answer:
b
Explanation:
Answer:
The first box, second box, and fourth box are correct. I think the fifth might be correct...not completley sure about the fifth box.
Explanation:
Electromagnetic induction is the process of producing an electric current by moving a loop of wire ____.
Answers
Answer:
through a magnetic field.
Explanation:
1) Sketch a walking model and a running model. List four events that occur in a walking cycle of one leg, and four events that occur in a running cycle of one leg. (5 pts) 2) Write the governing equation of ground reaction force based on 2nd Newtonian Law. Write the governing equations of forward kinetic energy and gravitational potential energy during walking. (5pts)
Answers
Walking and running are distinct forms of locomotion characterized by different movement patterns and energy dynamics. During walking, the forward kinetic energy is governed by the equation 1/2 mv^2.
In walking, the cyclic movement of one leg consists of four events. Firstly, during heel strike, the heel of the foot makes initial contact with the ground. Secondly, the foot continues to roll forward until it reaches foot flat, where the entire foot is in contact with the ground. Thirdly, at midstance, the leg is directly under the body, and the body's weight is supported by that leg. Finally, during toe-off, the heel lifts off the ground, and the leg propels forward for the next step.
In running, the cycle of one leg is more dynamic. It begins with initial contact, where the foot strikes the ground, usually with the midfoot or forefoot. This is followed by the loading response, during which the leg and foot absorb and distribute the forces generated by impact. Next is the midstance phase, where the body's weight is primarily supported by the stance leg. Finally, during propulsion, the leg pushes off the ground, generating forward momentum for the next stride.
The governing equation for ground reaction force is derived from Newton's second law of motion, which states that force is equal to mass multiplied by acceleration (F = ma). In the context of locomotion, the ground reaction force represents the force exerted by the ground on the leg or foot. This force is equal in magnitude but opposite in direction to the force exerted by the leg or foot on the ground.
During walking, the forward kinetic energy is determined by the equation 1/2 \(mv^2\) , where m represents the mass of the moving object (e.g., leg) and v denotes its velocity. This equation describes the energy associated with the leg's forward motion. Gravitational potential energy during walking is governed by the equation mgh, where m is the mass of the object, g is the acceleration due to gravity, and h represents the height of the center of mass of the leg above a reference point, such as the ground. This equation describes the energy associated with the leg's position relative to the ground and the Earth's gravitational field.
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Apply the Pauli exclusion principle to determine the number of electrons that could occupy the quantum states described by the following.
(a)
n = 4,
ℓ = 1,
mℓ = −1
_____ electrons
(b)
n = 4,
ℓ = 3
____ electrons
Answers
The number of electrons that could occupy the quantum states described by n = 4, ℓ = 1, and mℓ = −1 is 2.
(a) The quantum numbers given represent the 4p orbital. According to the Pauli exclusion principle, each orbital can accommodate a maximum of two electrons with opposite spins.
The number of electrons that could occupy the quantum states described by n = 4 and ℓ = 3 is 14.
(b) The quantum numbers given represent the 4f subshell. The number of orbitals in the 4f subshell is 7, and each orbital can accommodate a maximum of 2 electrons with opposite spins.
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please please help me thank you
Answers
Density of the hardwood block=0.54 g/cm3
Density of the ice block=0.9 g/cm3
According to the conservation of angular momentum, if an ice-skater starts spinning with her arms out wide, then slowly pulls them close to her body, this will cause her to: ____________
Answers
According to the conservation of angular momentum, if an ice-skater starts spinning with her arms out wide, and then slowly pulls them close to her body, this will cause her to spin faster. The conservation of angular momentum states that the total angular momentum of a system remains constant as long as no external torque acts on it. This means that if a spinning object pulls its arms closer to its body, its rotational speed will increase.
This is because the moment of inertia of the system is reduced as the mass is brought closer to the axis of rotation. Since the angular momentum of the system must remain constant, an increase in rotational speed must occur to compensate for the decrease in moment of inertia. The principle of conservation of angular momentum can be observed in many physical systems, such as figure skating, where an ice skater spinning with her arms extended can increase her rotational speed by pulling her arms closer to her body. This is because the total angular momentum of the skater is conserved, and the decrease in moment of inertia is compensated by an increase in rotational speed.
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If 45,000 Joules of work done in 90 seconds results in how much power?
Answers
P=E/T
E=P•T
T=E/P
P= 45,000J / 90sec
500W is your answer
How much work is done on a pumpkin with a force of 24 newtons when you lift it 15 meters? *
Answers
Answer:
I'm not that busy solving but I'll tell you the formula that Force x distance is equal to work done
The work is done on a pumpkin when we lift it by 15 m with 24 N is 360 J
What is Work ?Work done is the amount energy gained (loosed) in bringing the body from initial position to final position. It is denoted by W and its SI unit is joule(J).
i.e. Work(W) is force(F) times displacement(s).
W=F× s
When a body is displaced with 1 newton of force by 1 m, then we can say that work has been done on the body by 1 joule.
Writing for it's dimension,
W=F× s
Force has dimension [L¹ M¹ T²]
Displacement has dimension [L¹]
multiplying both the dimensions Force and Displacement
we get,
dimension of Work [L² M¹ T²]
According to newton's second law of motion,
Force(F) is mass(M) times acceleration(a).
i.e. F=ma
Given,
Force = 24 N
Displacement = 15 m
W=F.s= 24*15 = 360 J
Hence work done on pumpkin is 360 J
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One lap of a racetrack is equal to 1 . A runner completes 15 laps in an hour. What is his speed and
velocity?
Answers
Speed:-
\(\\ \tt\hookrightarrow \dfrac{Distance}{Time}\)
\(\\ \tt\hookrightarrow \dfrac{15}{1}=15km/h\)
Velocity:-
\(\\ \tt\hookrightarrow Displacement/Time \)
\(\\ \tt\hookrightarrow 0/1=0km/h\)
If all the forces acting on an object are balanced then the net force acting on it is zero. True or, false?
Answers
Answer:
true
Explanation:
if all forces are equal then there would be no stronger force to give any net force so it would be zero
True or false.
a-
Magnetic force is a force acting from a
distance.
Answers
the fact that you can see stars in the nighttime sky is evidence that
Answers
The fact that you can see stars in the nighttime sky is evidence that the Earth's atmosphere is transparent to visible light.
The Earth's atmosphere is composed of various gases, including nitrogen, oxygen, and trace amounts of other gases. These gases are not completely transparent to light, and they can scatter and absorb certain wavelengths of light. However, visible light, which is the range of electromagnetic radiation that we can see with our eyes, is mostly transmitted through the atmosphere without being absorbed or scattered too much. This is why we can see stars in the nighttime sky, as their light travels through the atmosphere and reaches our eyes relatively unimpeded. It is also important to note that the clarity of the nighttime sky can be affected by various factors, such as air pollution, cloud cover, and light pollution. Therefore, in areas with high levels of pollution or light interference, it may be more difficult to see stars in the nighttime sky.
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an eraser is dropped (straight down) from a table at the same time that a sharpener (on the same table) is thrown horizontally. which of the following statements is correct (ignore air resistance)?multiple select sharpener will hit the ground closer to the eraser will hit the ground the eraser and the sharpener will hit the ground the same eraser will hit the ground closer to the sharpener will hit the ground first.
Answers
1. Answer: The eraser will hit the ground first.
An eraser is dropped straight down from a table. When an object is dropped, it is moving in a straight line down, and its motion is in free fall. Because the object's motion is vertical and downwards, the acceleration of the object is -9.81 m/s² (due to gravity). The distance travelled by an object in free fall is: Distance (d) = 0.5 × g × t² where g is acceleration and t is time. Because the object is dropped, its initial velocity is zero. Therefore, t = √(2d/g). Since both objects are dropped at the same time, t is constant for both. This means that the height from which each object falls will determine the time they take to hit the ground. So, the eraser will hit the ground first.
2. Answer: Both objects will hit the ground at the same time.
A sharpener is thrown horizontally. When an object is thrown horizontally, its motion is in projectile motion, meaning its motion is both horizontal and vertical. The velocity of the object is in the horizontal direction, while its acceleration is in the vertical direction due to gravity. The horizontal motion is constant, while the vertical motion is in free fall. Because there is no air resistance, the time taken to fall is the same as it is for the eraser. Therefore, both objects will hit the ground at the same time.
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The gravitational acceleration on earth is 9.8 m/s2. what is the weight of a car on earth (to the nearest whole number) if it has a mass of 1360 kg?
Answers
Answer:
13328 Newtons
Explanation:
Definition of Weight
\(W=mg\)
We are given
\(m=1360\)
\(g=9.8\)
So the weight is equal to
\(W=1360*9.8\)
\(W=13328\)
a heat engine operates by group of answer choices usually having an efficiency equal to the maximum efficiency. transferring energy from a hot reservoir to a cold reservoir. always having an efficiency of 100% to conserve energy. usually having an efficiency less than the maximum efficiency. using a temperature difference between two thermal reservoirs.
Answers
The heat engine operates by using a temperature difference between two thermal reservoirs and transferring energy from a hot reservoir to a cold reservoir. Usually, the efficiency of a heat engine is less than the maximum efficiency, which is the theoretical limit for the efficiency of the engine.
The important to keep the engine operating within a safe temperature range to prevent damage or failure. A heat engine operates by using a temperature difference between two thermal reservoirs, transferring energy from a hot reservoir to a cold reservoir. In this process, it usually has an efficiency less than the maximum efficiency, as no engine can achieve 100% efficiency due to energy losses, primarily in the form of heat.
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it is seen that in a balloon filled with air,if we press one side of the balloon the other side bulges out.why is it so???
Answers
When we apply pressure on the one side of balloon the other side bulges out due to the movement of gas to other side.
What happen when we press one side of the balloon?If we press one side of the balloon, the other side bulges out because the gas that present on one side moves to the other side where there is no pressure. The body of balloon is elastic so when we apply pressure the other side bulges out.
So we can conclude that when we apply pressure on the one side of balloon the other side bulges out due to the movement of gas to other side.
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A flow chart showing step by step how the body responds to a cold using the words B cells, helper T cells, macrophages, mucus, lymph, cytokines, receptor proteins, antibodies, memory cells and plasma cells
Answers
The body's response to a cold involves various immune cells and processes. Here is a simplified flow chart depicting the step-by-step response:
Initial exposure to a cold virus leads to its entry into the body through the respiratory system. The virus infects the cells lining the respiratory tract, triggering a response from macrophages, which are immune cells that engulf and destroy foreign particles.Macrophages present viral antigens (molecular markers) on their surface and release cytokines, signaling molecules that activate other immune cells.Helper T cells recognize the viral antigens presented by macrophages through their receptor proteins, and they become activated.Activated helper T cells stimulate B cells, another type of immune cell, to produce antibodies specific to the cold virus.B cells differentiate into plasma cells, which secrete large quantities of antibodies into the bloodstream.Antibodies circulate in the body and bind to the cold virus, neutralizing its ability to infect cells.Memory B cells are also generated during this process. These cells "remember" the specific cold virus, enabling a faster and stronger immune response in case of future infections.The antibodies help to remove the virus from the body by marking it for destruction by other immune cells, such as macrophages and natural killer cells. Mucus production increases in the respiratory tract, trapping the cold virus and facilitating its removal from the body. Lymph, a clear fluid containing immune cells and antibodies, carries away the virus and other debris from the infection site.This flow chart demonstrates the coordinated response of B cells, helper T cells, macrophages, mucus production, lymph, cytokines, receptor proteins, antibodies, memory cells, and plasma cells in combating a cold virus and eventually eliminating it from the body.
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To practice Problem-Solving Strategy 7.1 Rotational dynamics problems.
Suppose that you are holding a pencil balanced on its point. If you release the pencil and it begins to fall, what will be the angular acceleration when it has an angle of 10.0 degreesfrom the vertical?
Sort the forces as producing a torque of positive, negative, or zero magnitude about the rotational axis identified in Part A. Keep in mind that counterclockwise rotations are positive.
Answers
Problem-Solving Strategy 7.1: Rotational Dynamics Problems Rotational dynamics is the study of rotational motion, which is movement about an axis or a pivot point. We'll look at a few sample problems that illustrate the procedure to approach and resolve rotational dynamics problems in this article. The below diagram depicts the scenario given: At an angle of 10 degrees, the pencil starts to fall. We need to determine the angular acceleration. The given problem does not provide the mass, length or other physical quantities of the pencil. Therefore, we assume that the pencil is a point mass with a negligible size. The torque equation is used to solve rotational motion issues.
It is given as follows: τ = Iα where τ is torque, I is moment of inertia and α is angular acceleration. Let's use this equation to solve the problem. Ignoring air resistance, the only force acting on the pencil is the gravitational force, which acts on the center of mass of the pencil. The gravitational force can be broken down into two components, mgcosθ and mgsinθ, where m is mass, g is acceleration due to gravity, θ is the angle of the pencil with respect to the vertical axis. Let's determine the direction of torque produced by these forces.(i) mgcosθ is acting on the center of mass of the pencil. As it is acting along the vertical line passing through the pivot point, the torque produced is zero.(ii) mgsinθ is acting at a perpendicular distance r from the pivot point.
The direction of torque produced by this force is counterclockwise, hence, positive magnitude. To find the angular acceleration, let's use the torque equation.τ = Iα= F = mr²α (Moment of inertia of point mass)α = τ / Iα = mgsinθ * r / (mr²)α = gsinθ / r Let's insert the values. g = 9.8 m/s²θ = 10.0°r = length of the pencil = unknown Here, the length of the pencil is unknown. If we take r as the length of the pencil and find the value of angular acceleration, it will be true only for this angle (10.0 degrees) because torque, and hence, angular acceleration, varies with respect to the length of the pencil. It will not be true for other angles. The relationship between the angle and the length of the pencil is given by the trigonometric function sinθ = r / L.α = gsinθ / rα = g / Lα = 9.8 / L radians/s²The angular acceleration is inversely proportional to the length of the pencil. This implies that the shorter the length of the pencil, the greater the angular acceleration and the longer the length of the pencil, the smaller the angular acceleration. Therefore, when we try to balance the pencil for a longer time, we need to use a smaller angular acceleration, so we need to keep the pencil vertical.
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The picture shows the solar panels that power all of the appliances in Joaquin's house.Joaquin is using his oven to bake cookies for his family. What energy transformations occur that enable him to bake cookies?heat energy → light energy → heat energybheat energy → chemical energy → light energyclight energy → electrical energy → heat energydlight energy → electrical energy → chemical energy
Answers
ANSWER:
C. light energy → electrical energy → heat energy
STEP-BY-STEP EXPLANATION:
Solar panels capture light energy from the sun, which must necessarily be converted into electrical energy to then generate heat to bake the cookies.
So, the correct order would be the following:
C. light energy → electrical energy → heat energy
Answer:yeah its C lol
Explanation:
Assume you charge a comb by running it through your hair and then hold the comb next to a bar magnet. Do the electric and magnetic fields produced constitute an electromagnetic wave?(a) Yes they do, necessarily.(b) Yes they do because charged particles are moving inside the bar magnet.(c) They can, but only if the electric field of the comb and the magnetic field of the magnet are perpendicular.(d) They can, but only if both the comb and the magnet are moving. (e) They can, if either the comb or the magnet or both are accelerating.
Answers
The electric and magnetic fields produced by charging a comb and holding it next to a bar magnet do not necessarily constitute an electromagnetic wave.
Option (c) is correct
They can form an electromagnetic wave, but only if the electric field of the comb and the magnetic field of the magnet are perpendicular. The movement of charged particles inside the bar magnet, as mentioned in option (b), is not directly related to the formation of an electromagnetic wave.
Additionally, options (d) and (e) are not necessary conditions for the production of an electromagnetic wave. They can form an electromagnetic wave, but only if the electric field of the comb and the magnetic field of the magnet are perpendicular.
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