an applied horizontal force of 92.4 n is exerted on a 171 n box. the box is on a horizontal floor and the coefficient of kinetic friction between the box and the floor is 0.386. at what rate will be box accelerate? include a free body diagram.
Answers
The box will accelerate at a rate of 1.49 m/s^2.
We first need to calculate the net force acting on it. The net force is the vector sum of all the forces acting on the box, and it determines the acceleration of the box using Newton's Second Law of Motion:
net force = mass x acceleration
\(net force = f applied - f_k\)
Since the box is not accelerating vertically, the net force in the vertical direction is zero, which means:
\(f_k = μ_k x f_N\)
\(net force = f_applied - f_k\)
\(= 92.4 N - (0.386) x f_N\)
\(= 92.4 N - (0.386) x (171 N)\)
\(= 26.0 N\)
\(f_N = m x g = 171 N\)
\(f_k = μ_k x f_N\)
\(= 0.386 * 171 N\)
\(= 65.9 N\)
Using Newton's Second Law, we can solve for the acceleration of the box: net force = mass x acceleration
\(26.0 N = 17.4 kg x acceleration\)
\(acceleration = 1.49 m/s^2\)
The mass of the box is \(m = 171 N / 9.81 m/s^2 = 17.4 kg\) (using the acceleration due to gravity g of \(9.81 m/s^2\)).
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Related Questions
helppppppppppppppppppppppp
Answers
Explanation:
v²= u² + 2as
v= final velocity.
u= initial velocity.
a= acceleration.
s= distance.
As electrons rotate about the nucleus, ? tries to cause them to fly off into space.
a. a magnetic field
b. atmospheric pressure
c. centrifugal force
d. the valence shell
Answers
Centrifugal force cause them to fly off into space.
The correct answer is option C. centrifugal force.
As electrons rotate about the nucleus, they experience a centrifugal force that tries to cause them to fly off into space. This force arises due to the fact that electrons are in constant motion around the nucleus and their movement creates a centrifugal force that pulls them away from the nucleus. However, this force is balanced by the attraction of the positively charged nucleus, which keeps the electrons in orbit. This balance between the centrifugal force and the attractive force of the nucleus determines the size and stability of the electron orbits. The centrifugal force is a key factor in the behavior of electrons in an atom and determines the stability of their orbits around the nucleus.
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a 62 g particle is moving to the left at 29 m/s . how much net work must be done on the particle to cause it to move to the right at 51 m/s ?
Answers
In order to cause a 62 g particle to move to the right at 51 m/s, net work must be done on the particle.
This is because the particle is currently moving to the left at 29 m/s, and to change its velocity from 29 m/s to 51 m/s, energy must be added to the particle. The amount of energy that would need to be added is equal to the change in kinetic energy of the particle (KEf - KEr).
Since kinetic energy is equal to 1/2 mv², the net work required can be calculated by multiplying the mass of the particle (62 g) by the change in velocity (51 - 29 m/s) squared, divided by two. This work must be performed on the particle in order to cause it to move to the right at 51 m/s.
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Reflection, refraction, and diffraction
all cause light
waves to
A) bend
B) change direction
C)stand still
D)absorb energy
Answers
Answer:
B) change direction
Explanation:
Diffraction is the change of direction of waves that occurs when waves travel from one medium to another.
Reflection is the change of direction of waves when they bounce off of a barrier.
Refraction is the change of direction of waves that happens when waves pass from one medium to another.
Each of these are all the change in direction of waves.
Ball A is negatively charged and ball B is electrically neutral. What happens to the charges of both balls when they come into contact with each other if:
(a) they are made of an electrical conductor
describe what will happen
(b) they are made of insulator
describe what will happen
Answers
Answer:
ans for A)
Ball A being negatively charged and Ball B being neutral
when they come into contact.... electrons from the ball A will transfer to ball B and since they are covered by an electrical conductor... their contact will form a joint pathway for electric charge to be transferred to another object.
Answer: i think A
Explanation:
What would be the weight of a 60-kg astronaut on a newly discovered planet that is found to have density 2/3 ρᴇ and radius 2Rᴇ , where ρᴇ and Rᴇ are the density and radius of Earth, respectively?
A) 200N
B) 600N
C) 800N
D)1800N
Answers
The weight of the astronaut on the newly discovered planet is approximately 1800N, which is option D.
How is acceleration due to gravity calculated?The weight of an object is given by the formula W=mg, where g is the gravitational acceleration and m is the mass of the object. The gravitational acceleration on the surface of a planet can be calculated using the formula \(g = GM/R^2\), where M is the mass of the planet, R is its radius, and G is the gravitational constant.
In this case, we are given that the planet has density 2/3 ρᴇ and radius 2Rᴇ. The mass of the planet can be calculated using the formula M = (4/3)π\(R^3\)ρ, where ρ is the density of the planet. Substituting the given values, we get:
M = (4/3)π(2Rᴇ\()^3\)(2/3ρᴇ) = (32/27)πρᴇRᴇ\()^3\)
The gravitational acceleration on the surface of the planet can be calculated as:
g = GM/R^2 = G[(32/27)πρᴇRᴇ^3]/(2Rᴇ\()^2\) = (4/3)Gπρᴇ
The weight of the astronaut on the planet can be calculated as:
W = mg = 60[(4/3)Gπρᴇ] = (80/3)Gπρᴇ
Substituting the value of G and ρᴇ, we get:
W = (80/3)(\(6.67 * 10^-^1^1\))(\(5.5 * 10^3\))π ≈ 1818.9 N
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I’m on earth.I have an object with a mass of 15 kg. When I put it on a scale, what will the scale read?
Answers
The scale will read 147N
Explanation:The mass of the object, m = 15 kg
Since I am on the earth, the acceleration due to gravity on the earth is:
g = 9.8 m/s²
The scale will read the weight of the object, and is calculated below
The weight, W = mg
W = 15(9.8)
W = 147 N
Therefore, the scale will read 147N
Why should a physical quantity be measured?
Answers
Answer:
It allows us to understand nature much more deeply than does qualitative description alone.
Explanation:
Without explaining the measurements, a quantity cannot always be measured.
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sir isaac newton organized the visible colors into chart known as the
Answers
Sir Isaac Newton organized the visible colors into a chart known as the color spectrum or Newton's color wheel.
Newton conducted experiments with light and prisms in the 17th century, leading to his groundbreaking work on the nature of light and color. He observed that when white light passes through a prism, it separates into a continuous band of colors. This band of colors, arranged in a specific order, became known as the color spectrum. Newton's color spectrum consists of the colors red, orange, yellow, green, blue, indigo, and violet. He arranged these colors in a circular shape, resembling a wheel, where each color transitions smoothly into the next. This representation of colors was a significant contribution to our understanding of the visible light spectrum and paved the way for further investigations into the properties of light and color by subsequent scientists.
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sir isaac newton organized the visible colors into chart known as the_____.
A telescope mirror is part of a sphere with a radius of 3 m. what is the focal length of the mirror?
Answers
The focal length of the mirror will be 0.33 m
Focus is defined as the point through which the reflected light rays pass (or appear to pass) when incident light rays are parallel to the principal axis. It is located at the midpoint of pole and center of curvature. The distance between the pole and the focus of the mirror is called the focal length of the mirror.
F =2R or focal length of a mirror is half of its radius of curvature.
The radius of curvature of convex or concave mirror is equal to two times of the focal length of convex or concave mirror. The radius of curvature is the radius of sphere formed by the convex or concave mirror. It is also equal to the distance between the pole and center of curvature.
F = 1/R
R = 3 m (given )
F = 1 / 3 = 0.33 m
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which assumption about level of measurement is made for the chi square test?
Answers
The chi-square test assumes that the variables being analyzed are measured at a nominal or ordinal level of measurement.
In statistics, the level of measurement refers to the nature and properties of the data being collected. There are four levels of measurement: nominal, ordinal, interval, and ratio. Nominal and ordinal levels are considered categorical, while interval and ratio levels are considered numerical. The chi-square test is specifically designed for analyzing categorical data, where the observations can be classified into distinct categories or groups. It is used to determine whether there is a significant association or relationship between two categorical variables.
The test calculates the difference between the observed frequencies and the expected frequencies under the assumption of independence between the variables. It compares the observed and expected frequencies using a chi-square statistic and determines the p-value to assess the statistical significance of the association. Therefore, the chi-square test assumes that the variables being analyzed are measured at a nominal or ordinal level because it deals with categorical data and evaluates the relationship between different categories or groups.
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Consider two identical frictionless and banked curves – one is located on the earth, and the other is on the moon. If identical cars are to travel around each curve along a circle of the same radius, how must the speeds of the two cars compare?.
Answers
In order to determine how the speeds of two cars travelling around two identical frictionless and banked curves must compare if they are along a circle of the same radius, given one curve is on Earth while the other is on the moon, we can make use of the formula below
:centripetal force = (mass of object × velocity^2)/radius of the circle travelled For circular motion
centripetal force is provided by friction between the tyres of the vehicle and the ground. This force depends on the normal force acting on the vehicle from the ground. The normal force in turn depends on the force of gravity experienced by the object and the angle of banking of the curve. In this case, since both curves are identical and frictionless, the normal force on the cars will be the same as well.
Thus, centripetal force experienced by each car is the same, given they are travelling around a circle of the same radius .Therefore, from the formula: centripetal force = (mass of object × velocity^2)/radius of the circle travelled velocity = √(centripetal force × radius of the circle travelled/mass of object
)From the formula above, we can conclude that the speeds of the two cars must be the same regardless of the fact that one curve is on Earth and the other is on the moon, since the radius of the circle travelled by both cars are the same, the mass of both cars are the same, and the centripetal force experienced by both cars are the same.
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a ball is held at rest at the top of a hill. the ball is then released and starts rolling down the hill. at the bottom, it reaches level ground and keeps rolling along the ground. consider the level ground at the bottom of the hill as zero height. select the type or types of energy the ball has at the top of the hill.
Answers
Gravitational Potential Energy is the type of energy the ball has at the top of the hill.
What is meant by Gravitational Potential Energy ?The energy that an item has due to its location in a gravitational field is known as gravitational potential energy. For an object close to the surface of the Earth, when the gravitational acceleration may be considered to remain constant at around 9.8 m/s, gravitational potential energy is most frequently used.Gravitational potential energy may be defined as an energy that has a connection to gravitational force or gravity.If an item is placed at a height above (or below) the zero height, it has gravitational potential energy. If an item is not in its equilibrium position on an elastic material, it has elastic potential energy.Learn more about Gravitational Potential Energy refer to :
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I wasted my time, pls help me with this again
Answers
Answer:
current = 0.364 A
Explanation:
Resistance = Voltage / Current
33 ohms = 12 Volt / current
current = 12 / 33
current = 0.364 A
Find the distance an object traveled if a force of 350 n acted on it to produce 0 work?
Answers
Force(F) = 350 N
Work (W)= 0 J
Apply the formula:
Work = Force x Distance
Isolate distance(d)
Distance = Work/ Force
d = W/F = 0 /350 = 0 m
The distance that the object traveled is 0 (zero)
What allows a pump to raise fluids in pipes
Answers
Answer: The energy to move the fluid is provided by the pressure on the fluid surface.
Explanation: The frictional losses in the suction pipework and rises in the suction pipework system will reduce the fluid pressure at the pump inlet. If the pump inlet connection is removed the fluid will not flow out of the suction pipework. Hope this helps! :)
Humpty Dumpty (5 kg) is about to a bungee jump from a 50-meter high bridge. Feeling nervous, he paces back and forth with a velocity of 2 m/s. What is Humpty Dumpty's GRAVITATIONAL POTENTIAL ENERGY before jumping?
Answers
Answer:
E = 2450 J
Explanation:
Given that,
Mass of Humpty Dumpty, m = 5 kg
He jumps from a 50 m high bridge.
Feeling nervous, he paces back and forth with a velocity of 2 m/s.
We need to find Humpty Dumpty's gravitational potential energy before jumping. The formula is given by :
\(E=mgh\\\\E=5\times 9.8\times 50\\\\E=2450\ J\)
So, the required gravitaional potential energy is 2450 J.
i need help with this!! please
Answers
The time taken for the passenger jet to move from 5 km/h to 460 km/h on the run way during the take off is 10.03 s
How do i determine the time taken?From the question given above, the following data were obtained:
Acceleration (a) = 12.6 m/s² Initial velocity (u) = 5 km/h = 5 / 3.6 = 1.39 m/sFinal velocity (v) = 460 km/h = 460 / 3.6 = 127.78 m/sTime taken (t) =?The time taken for the the passenger jet to move from 5 km/h to 460 km/h can be obtained as follow:
a = (v – u) / t
12.6 = (127.78 – 1.39) / t
12.6 = 126.39 / t
Cross multiply
12.6 × t = 126.39
Divide both sides by 12.6
t = 126.39 / 12.6
t = 10.03 s
Thus, we can conclude that the time taken is 10.03 s
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what could be some reasons finding a non zero intercept mass over volume
Answers
The reasons for finding a non-zero intercept in a mass over volume relationship could be due to systematic errors, presence of impurities, incorrect data analysis, or inherent properties of the system. Always ensure accurate measurements, use pure samples, and apply the appropriate data analysis techniques to obtain reliable results.
Some reasons for finding a non-zero intercept in a mass over volume relationship could be:
1. Systematic errors: Inaccurate measurements or calibration errors in the measuring instruments can lead to a non-zero intercept. For example, using an uncalibrated balance for mass measurement can give incorrect values, affecting the intercept.
2. Presence of impurities: If the sample being analyzed contains impurities, the mass and volume measurements will be affected, resulting in a non-zero intercept. It's important to use a pure sample for accurate results.
3. Incorrect data analysis: Mistakes in data analysis or fitting the data to the wrong model may lead to a non-zero intercept. Ensure you're using the correct method and model for the relationship you're investigating.
4. Inherent property of the system: In some cases, a non-zero intercept might be a characteristic of the system being studied. For example, if the relationship between mass and volume is not linear or if there's a minimum volume that the system occupies, even at zero mass, a non-zero intercept may be expected.
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Which of the following is Newton's Second Law of Motion?”
“A moving object will continue to move at the same velocity until there is a change in
direction or an external force is applied to it."
"When a force acts on an object, the rate of change of momentum experienced by the
O object is proportional to the size of the force and takes place in the direction in which the
force acts.
"For every force that is exerted by one body on another, there is an equal and opposite
force exerted by the second body on the first."
"A body continues in a state of rest or of uniform velocity unless acted on by an external
force.
Answers
Please Answer!!!!
what is the force on a 66kg person falling from an airplane?
Answers
Answer: 660 N.
Explanation: Force on a free falling body is F=mg.
Therefore, Force =66×10 =660
(g is gravitational acceleration, taking it as 10)
Design the safest possible SUV with a crumple zone length of 85 cm, no CAS, and a speed of 20 m/s (45 mph). (Note: Injuries such as broken legs are not allowed. )
Answers
The crumple zone of a car is obtained as the final speed divided by initial speed.
What is a crumple zone?The crumple zone is put in vehicles to manage the energy expended during deceleration of a vehicle in an accident situation thereby preventing the deformation of passengers and preventing injury.
The crumple zone of a car is obtained as the final speed divided by initial speed.
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what is the difference between a free body diagram and a vector diagram?
Answers
Answer:
Free body diagrams are used to describe situations where several forces act on an object. On the other hand Vector diagrams are used to resolve (break down) a single force into two forces acting as right angles to eachother
Explanation:
Hope this helps !
The output of a solar panel powers a small pump. The pump operates a garden water fountain. The output of the solar panel is 10 V and the current supplied to the pump is 0.25 A. Calculate the electrical power generated by the solar panel.
Answers
The power generated by solar panel will be "2.7 W".
According to the question,
The values are:
Output of solar panel,
10 VCurrent,
0.25 AThe electrical power generated will be:
→ \(P = VI\)
By substituting the given values is the above formula, we get
→ \(= 10\times 0.27\)
→ \(=2.7 \ W\)
Thus the above answer is right.
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Evidence of liquid water in mars' distant past suggests that it had a substantial atmosphere compared to what it has presently. What happened to its water vapor?.
Answers
Answer:
The atmosphere has frozen out into the polar ice caps and permafrost as Mars has cooled.
Explanation: Good luck box BrokenTag27
Write about natural indicators.
Answers
Hope this answers ur questions
If a 25 kg object is moving at a velocity of 10 m/s, the object has
energy. Calculate it.
Answers
Answer: Your answer is 1250J
Explanation:
K E = 1/2 m v 2
The mass is
m = 25 k g
The velocity is v = 10 m s − 1
So,
K E = 1 /2 x25 x 10 2^2= 1250 J
pls mark brainiest answer
Two students are trying to decide whether or not Object A is charged. They perform the following two
tests:
Test 1: They bring Object A near a positively charged tape and observe attraction.
Test 2: They bring Object A near a negatively charged tape and observe attraction.
These two tests lead to the conclusion that Object A is
a.
charged negatively
b. charged positively
c. electrically neutral
d. charged, but with an unknown type of charge
Answers
Is the image formed by a plane mirror always real?
True or false?
Answers
A potted plant falls from the window of an apartment building. It falls for 2.0 s and then hits the ground. What is the speed of the plant just before it hits the
ground? Assume only gravity is acting on it.
A) 20m/s
B)9.8m/s
C)2.0m/s
D)4.9m/s
Answers
Answer:
D) 4.9 m/s
Explanation:
Speed of Object in Free Fall
s = Rate of Acceleration, Due to Gravity × Length of Time
s = 9.8 × 2.0
s = m/s (Round Up to The Nearest Whole Number)
--
m/s = 9.8 ÷ 2.0 = 4.9 m/s