Directions: Consider a 2-kg
bowling ball sits on top of a
building
that is 40 meters tall. It falls
to the ground. Think about
the
amounts of potential and
kinetic energy the bowling
ball has:
as it sits on top of a
binding that is 40 meters
tall
as it is half way through a
fall off a building that is 40
meters
tall and travelling 19.8
meters per second.
as it is just about to hit the
ground from a fall off a
building that is 40 meters tall and
travelling 28 meters per
second.
Question 3: What is the
gravitation constant value
here on earth?
Question 4: Does the
bowling ball have more
potential energy or kinetic
energy as it sit on top of the
building? Why?
Question 9: What is the
kinetic energy of the ball as
it is half way through the
fall?
Answers
The definition of mechanical energy allows to find the results for the questions about the energy changes in the movement of the system are:
1) The midpoint of the path. Em = 784 J
2) Lowest point of the trajectory Em = 784 J
3) Acceleration of gravity is: g = 9.8 m/s²
4) The bowling ball has more kinetic energy as its height decreases.
Mechanical energy.Mechanical energy is the sum of the kinetic energy due to motion and the potential energies of the body. In the case of no friction the energy remains constant at all points, this is one of the most important principles of physics.
Em = K + U
Em = ½ m v² + m g h
Where Em is the mechanical energy, K and U the kinetic and potential energy, respectively, m the mass, v the velocity. G the acerleacion of gravity and h the height where the body is.
In this case when the ball is on top of the building of height y = 40 m, all its energy is potential.
Em = U = m g h
Em = 2 9.8 40
Em = 784 J
when the body falls it begins to acquire speed, therefore its kinetic energy increases and the height decreases, therefore its potential energy decreases, but the sum of the two remains constant.
1) Let's calculate the energy at the midpoint of the path.
They indicate that the speed is v= 19.8 m/s and the height is y2 = 20m
Em = ½ m v² + m g h
em = ½ 2 19.8 ² + 2 9.8 20
em = 392 + 392
Em = 784 J
We see that the kinetic and potential energy have the same value and the mechanical energy maintains its initial value.
2) We calculate the energy at the lowest point of the trajectory.
They indicate that the speed is v= 28 m/s and = height is zero h=0
Let's calculate
Em = ½ m v² + m g h
Em = ½ 2 28² + 0
Em = 784 J
At this point, all energy is kinetic and mechanical energy is conserved.
3) The acceleration of gravity comes from Newton's second law where the force is the universal attraction.
F = \(G \frac{Mm}{r^2}\)
F= ma
\(\G frac{Mm}{R^2}\)
In the case of a body near thesurfacee of the distance of the radius of the planet and the acceleration is called gravity
g = a = \(G \frac{M}{R_e^2 }\)
g = \(\frac{ 6.67 \ 10^{-11} \ 5.98 \ 10^{24}}{6.37 \ 10^6 }\)
g = 9.81 m/s²
4) The bowling ball has more kinetic energy as its height decreases, at the point where the height is half the kinetic and potential energy are equal.
In conclusion using the definition of mechanical energy we can find the results for the questions about the energy changes in the movement of the system are:
1) The midpoint of the path. Em = 784 J
2) Lowest point of the trajectory Em = 784 J
3) Acceleration of gravity is: g = 9.8 m/s²
4) The bowling ball has more kinetic energy as its height decreases.
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Related Questions
4. What property of metals make them good conductors of heat?
Answers
Answer:
Their mobile electrons
Explanation:
please answer this question
Answers
Answer:
C
Explanation:
at a height of 5.0 m, a 2.0 kg cart rolls down a ramp going 4.0 m/s how much energy was lost due to friction
Answers
The energy lost due to friction is 82 J.
What is lost energy?This is the energy lost by a body due to friction.
Note: The energy lost due to friction = Potential energy-kinetic energy.
To calculate the energy lost by friction, we use the formula below.
Formula:
E' = mgh-mv²/2.............. Equation 1E' = Energy lost due to frictionm = mass of the carth = heightv = velocity of the cartg = acceleration due to gravity.From the question,
Given:
m = 2 kgh = 5 mv = 4 m/sg = 9.8 m/s²Substitute the given values into equation 1
E' = (2×5×9.8)-(2×4²/2)E' = 98-16E' = 82 J.Hence, The energy lost due to friction is 82 J.
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For a concave mirror, an object located from infinity to the focal distance F (regions 1 and 2) forms a ________ (real upright), (real inverted), (virtual upright), (virtual inverted) image located on the same opposite side of the mirror as the object.
Answers
For a concave mirror, an object located from infinity to the focal distance F (regions 1 and 2) forms a real inverted image located on the same opposite side of the mirror as the object.
When an object is located from infinity to the focal distance of a concave mirror, the image formed is real and inverted. This is because the light rays converge to a point after reflecting off the mirror, creating an actual intersection of the light rays. The image is located on the same opposite side of the mirror as the object.
Therefore, an object located from infinity to the focal distance F (regions 1 and 2) forms a real inverted image located on the same opposite side of the mirror as the object.
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Which of the following is true about particles of matter?
Answers
Answer:
Matter is a substance which has mass and takes up space by volume the properties of matter are,
States of matter (solid,liquid,gas)are inter convertable.
Force of attraction varies from one kind of matter to another.
States of matter can be varied by varying temperature and pressure.
Explanation:
Suppose that the number of bird species is determined mainly by the number of vertical stratified layers present in their environment. Based on your understanding of terrestrial biomes, in which biome would you expect to find the greatest number of bird species
Answers
The tropical rainforest biome has the highest number of bird species compared to any other biome, with an estimated 2,000 species.
We can assume that the greater number of vertical stratified layers in an environment, the greater number of bird species that environment can support. Therefore, the biome with the greatest number of vertical stratified layers would likely have the greatest number of bird species.
The biome that fits this description best is the tropical rainforest biome. This biome has multiple layers, including the emergent layer, canopy layer, understory layer, and forest floor layer. Each layer has different plants and animals that inhabit them, providing diverse habitats for various bird species.
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the dose equivalent limits for radiation workers is based on the radiation received from what sources
Answers
The dose equivalent limits for radiation workers are based on the radiation received from the two external and internal sources of radiation.
The dose equivalent limits for radiation workers are established by different national and international regulatory agencies, such as the International Commission on Radiological Protection and the U.S. Nuclear Regulatory Commission.
The limits are outlined to minimize the risk of radiation-induced health effects, such as cancer, while allowing for necessary exposure in various situations, such as in medical treatments or in nuclear power plants.
External sources of radiation contain radiation that comes from outside the body, such as from gamma rays or x-rays.
Internal sources of radiation, on the other hand, come from radioactive materials that are taken into the body through ingestion or inhalation.
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1. Describe the path light takes as it travels through air and into glass.
Answers
The path light bends as it travels through air and into glass.
What is light?The light is the ray form of energy obtained from the Sun.
The path of light will look like bended when it has crossed the interface of two medium.
As. the light ray falls on the surface of glass travelling through air, the ray appears to bend after refraction.
Thus, the path of light bends as it travels through air and into glass.
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A box of tools rests in the back of a pickup truck. The truck accelerates to the north and the box remains at rest in the truck. The direction of the friction force on the box of tools is _____.
Answers
Answer:
The direction of friction force is toards north.
Explanation:
A tool box is at rest on the back of a track. The truck is accelerating towards north.
As the frame of reference is acceleratinf so it is a non inertial frame of reference.
Thus, teh toolkit experineces a pseudo force towards the south direction.
According to the question, the toolbox is at rest so the fiction force is balances by teh psheudoforce, and thus teh friction force is acting toards north.
Question 1 of 10
corded
Angles K and D are what kind of angle pair?
Corresponding
Same-side interior
Vertical
Alternate interior
A
K
B
C
n
D
Lines m and n are parallel
m
SUBMIT
Answers
The type of angle pair between angles K and D is "Alternate interior," 4th option.
What is an Alternate interior angle?"Alternate interior" angles are a pair of angles on opposite sides of a transversal line that are between two parallel lines. When two lines are parallel, alternate interior angles are equal in measure. In this case, lines m and n are parallel, and angles K and D are located on opposite sides of the transversal line AB.
They do not add up to 180° unless the alternate interior vertical angles are 90°. If the alternate interior angles are obtuse, adding them together will yield a value greater than 180°.
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Nitrogen , Carbon, Hydrogen, Calcium , Oxygen and Iron are all examples of a(n)
Answers
Answer:
All four words are the name of elements.
Hydrogen, oxygen, carbon, nitrogen, calcium, and iron are all important substances found in the body and in environments. They can be combined with each other, and with other substances to form larger compounds.
But i think the answer is nucleic acids..
Explanation:
Well, hope it helps you..
I tried to answer it..
Your welcome in advance..
(◍•ᴗ•◍)
The following figure is from a student’s experiment to find the centre of mass of an irregular shape.
a. Explain how the student used the following equipment to find the centre of mass:
• String
• A small mass (e.g. adhesive putty)
• A stand
• A pencil
• A straight-edge (e.g. ruler).
Include a diagram of the experimental set-up as part of your explanation.
Answers
To find the center of mass of an irregular shape using
String- for hanging at the center
• A small mass - hung from the string
• A stand-holding up the string
• A pencil pinpointing the center
• A straight-edge- Identify the middle
What is the center of mass?Generally, a point indicates the mean location of the matter in a body or system.
In conclusion, the center of mass also indicates a point at which the body is most balanced under gravity.
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What is the speed of gravity on Earth?
(Free question if your learning physics!)
Answers
Answer:
25038.72 mph (filler please ignore)
Answer:
Ignoring the effects of air resistance, the speed of gravity on Earth is 9.81 m/s 2.
Explanation:
The moment of inertia of a solid cylinder about its axis is given by 1/2MR 2 . If this cylinder rolls without slipping, the ratio of its rotational kinetic energy to its translational kinetic energy is:A. 1:1
B. 2:2
C. 1:2
D. 1:3
Answers
There is a box on the floor. The following forces are being applied to it:
There is 25 N of gravitational force
* There is 50 N of applied force
* There is 100 N of normal force
* There is 40 N of friction force
The horizontal force applied to it is _N
Your answer
Answers
The answer is 6.
Add 4 then divide 2. You should have 18 after you do that, subtract 10 then multiply 20. You then have 6.
Answer:
maneeee , i just need a couple points so ..
Explanation:
hehee , played yall
30 ml= 30 ml- 26 mL 26 mL- 22 ml -22 ml- -B 18 ml 18 ml- 14 mL 14 mL- 10 ml- 10 ml- X The mass of sample X is 20.0g. It was placed in a graduated cylinder and the water level rose from A to B. What is the density of sample X? Pay close attention to significant figures.
Answers
Answer:4.0
Explanation:
a vector is 253 m long and points in a 55.8 degree direction, what’s the y and x- component of the vector?
Answers
Well we know the hypotenuse of the triangle which is 253 m. And we know the angle of the triangle which is 55.8 degrees. So we want to find y. And to find y we use sin. And sin is a ratio, the ratio of the opposite leg, and hypotenuse. So sin(55.8) = y/253. Now we solve for y by multiplying both sides by 253. And finally we get 209.25 as the length of the y component.
The gravitational field on the surface of the earth is stronger than that on the surface of the moon. If a rock is transported from the moon to the earth, which propertie of the rock change? a. mass only b. weight only c. both mass and weight d. neither mass nor weight
Answers
When a rock is transported from the moon to the earth, both mass and weight are changed.
Explanation:
The reason why both mass and weight are changed when a rock is transported from the moon to the earth is that the gravitational field on the surface of the earth is stronger than that on the surface of the moon.
This means that the rock's mass, which is the measure of the amount of matter that an object contains, will remain the same.
However, the rock's weight, which is the force with which an object is attracted to the earth due to gravity, will be different since the gravitational pull on the moon is much weaker than that on the earth. This implies that when the rock is transported from the moon to the earth, it will experience a higher gravitational force which will cause it to weigh more compared to when it was on the moon.
Therefore, both mass and weight will change when a rock is transported from the moon to the earth.
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pls help i’ll give brainliest if you give a correct answer!!
Answers
Answer:
B
Explanation:
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if a circuit has three batteries each would 3 volts how much total voltage is it in the circuit?
Answers
a baseball is hit with a horizontal speed of 16 m/s and a vertical speed of 12 m/s upward. what are these speeds 5 s later?
Answers
After t = 4 seconds, ascertain the baseball's vx and vy horizontal and vertical speeds. Only the pressure applied on the object's vertical component—gravity—is recognized by us. This indicates that the perpendicular speed is unchanged.
What is the easiest way to define gravity?A planet and maybe other bodies pull objects toward their centers through their gravitational force. The gravitational attraction of the sun keeps all of the planets in their orbit around it.
How do these two things affect gravity?The size of an object and its distance from other things both have an impact on gravity. The mass of a thing is a gauge for its matter content. A heavier object will fall to the ground more quickly than a lighter one. Gravitational pull weakens when the separation between two objects grows.
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given that circuit has a current-voltage response of , in , in , what is the maximum voltage for which the voltage source is not supplying power when the voltage source is connected to circuit ?
Answers
The maximum voltage for which the voltage source is not supplying power when connected to the circuit is 2 V.
To determine the maximum voltage for which the voltage source is not supplying power, we need to find the voltage at which the circuit is consuming the maximum amount of power. We can do this by finding the voltage at which the product of current and voltage is maximum.
Using the given current-voltage response of the circuit, we can plot a graph of power vs voltage. From the graph, we can see that the circuit consumes maximum power at 2 V. At this voltage, the product of current and voltage is maximum, indicating that the circuit is consuming the most power.
Therefore, any voltage higher than 2 V will cause the voltage source to supply power to the circuit, while any voltage lower than 2 V will cause the circuit to consume power from the voltage source.
The maximum voltage for which the voltage source is not supplying power when connected to the circuit is 2 V, as at this voltage the circuit consumes the maximum amount of power.
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A wire that is cold has less resistance than a wire that is hot
True
False
Answers
If a single lens forms a real image, we can conclude that:.
Answers
If a single lens forms a real image, we can conclude that the object is placed at a distance greater than the focal length of the lens.
A real image is formed when light rays converge at a point and can be projected onto a screen or surface. This indicates that the lens has refracted the light rays and brought them together to form the image.
The position of the real image is determined by the distance between the lens and the object. If the object is placed within the focal length, the lens will form a virtual image that is upright and magnified. However, when the object is placed beyond the focal length, the image formed will be inverted and smaller than the object.
Understanding the formation of real images is important in various fields such as photography, microscopy, and astronomy. It allows us to predict the position and characteristics of the image formed by a lens and make necessary adjustments to obtain the desired image.
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The seed planted at extreme cold or in the region of frozen ice do not germinate, why?
Answers
Answer:
yes
The the seed planted at Extreme cold or in the region of frozen I did not germinate because the amount of moisture of the seed is too high which results in lack of air of the sea in the frozen ice
In fact, a soil temperature below 50°F might be problematic for many garden plants. Seeds will quickly absorb water at 40°C, but they won't begin to grow. This presents a risk for rot and disease, which may cause damping-off or subpar growth.
What is germination of seed?The formation of the seedling is the consequence of germination, which is often the growth of a plant inside a seed. It is also the process of the seed's metabolic machinery being reactivated, which causes the radicle and plumule to emerge. A vascular plant's seed is a little bundle that develops in a fruit or cone as the result of the union of the male and female reproductive cells.
Given the need for particular internal or external stimuli to resume growth, dormant seeds are viable seeds that do not germinate. When the right circumstances are present, the seed starts to germinate and the embryo starts to grow again, eventually becoming a seedling.
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The position of a mass oscillating in a fluid is given by x(t)=6e−tcos( 2πt) where t is time in seconds. Determine the velocity of the mass at t=3.8 seconds rounded off to three decimal places. (Fact: The velocity of an object is equal to the first derivative of its position with respect to time.)
Answers
The velocity of the mass at t = 3.8 seconds is -5.192m/s (approx) when rounded off to three decimal places.
Given ,The position of a mass oscillating in a fluid is given by x(t) = 6e−tcos(2πt), where t is time in seconds.
To find:
Determine the velocity of the mass at t = 3.8 seconds rounded off to three decimal places.
The velocity of an object is equal to the first derivative of its position with respect to time.
The velocity v(t) is the first derivative of x(t) with respect to time.t is given as 3.8 seconds in the given function, x(t).
Differentiate the function x(t) with respect to time,
t.v(t) = dx(t)/dt = d/dt [6e^(−t) cos(2πt)]v(t)
= -6e^(−t) sin(2πt) - 12πe^(−t) cos(2πt)
When t = 3.8 seconds, put the value of t in the above equation
v(3.8) = -6e^(−3.8) sin(2π × 3.8) - 12πe^(−3.8) cos(2π × 3.8)v(3.8) = -5.192m/s
Hence, the velocity of the mass at t = 3.8 seconds is -5.192m/s (approx)
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which formula can be used to find the centripetal acceleration of an orbiting object? ac = ac = ac = ac =
Answers
An object travelling in a circular path will experience centripetal acceleration.
It is directed towards the centre of the circle and allows the object to continually change its direction without changing its speed. The direction of centripetal acceleration is always perpendicular to the object's velocity.
The formula to calculate the centripetal acceleration of an orbiting object is:
ac = v² / r
Where:
ac represents the centripetal acceleration (measured in meters per second squared, m/s²).v is the orbital velocity of the object (measured in meters per second, m/s).r denotes the radius of the orbit (measured in meters, m).To know more about centripetal acceleration follow
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Already moving at 8 m/s , wendy pushes yasmine in her sled with a diagonal 300.0 n force. th coefficient of kinetic friction between yasmine's sled and the ground is 0.30. how fast will yasmine be going after wendy pushes him for 15.00m
Answers
Answer:
You must exert a force of 4.5 N on a book to slide it across a table.
Explanation:
consider an rlc circuit with resistance 3 ohms, inductance 0.1 henrys, capacitance 0.004 farads, and an impressed voltage, provided by an alternating current generator, of e ( t )
Answers
The total impedance of the RLC circuit is 864.27 ohms.
The total impedance of an RLC circuit with resistance 3 ohms, inductance 0.1 henrys, capacitance 0.004 farads, and an impressed voltage, provided by an alternating current generator, of e(t) can be found using the following formula:
Total Impedance, Z = sqrt(R^2 + (XL - XC)^2)
where, R = Resistance = 3 ohms
XL = Inductive Reactance = 2πfL, where f is the frequency of the AC generator and L is the inductance of the circuit
XC = Capacitive Reactance = 1/2πfC, where f is the frequency of the AC generator and C is the capacitance of the circuit.
Substituting the given values,
R = 3 ohmsL = 0.1 henrys
C = 0.004 farads
The formula for finding the Inductive Reactance,XL = 2πfL...[1]
The formula for finding the Capacitive Reactance,XC = 1/2πfC...[2]
The impressed voltage provided by an alternating current generator = e(t).
Since no frequency is given, let's consider the frequency to be 50 Hz.
Total Impedance, Z = sqrt(R^2 + (XL - XC)^2)
Using equation [1],XL = 2πfL= 2π(50)(0.1) = 31.42 Ω
Using equation [2],XC = 1/2πfC= 1/(2π(50)(0.004)) = 795.8 Ω
Substituting these values in the above formula, we get:
Z = sqrt(3^2 + (31.42 - 795.8)^2)
= sqrt(9 + 748575.78)= 864.27 Ω.
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1. Black Panther ran 567.6 km to the east in 23 hours then turned around and ran 221.8 km to the west in 1.2 hours. What was his average velocity during the trip in km h?p
Answers
Answer:
80.08 km/h
Explanation:
Given that Black Panther ran 567.6 km to the east in 23 hours
Velocity = distance covered/time
Substitute the distance covered and time into the formula
Velocity = 567.6/23
Velocity = 24.68 km/h
then turned around and ran 221.8 km to the west in 1.2 hours.
Velocity = 221.8/1.2
Velocity = 184.83 km/h
What was his average velocity during the trip in km/h ?
Average velocity = (V + U)/2
Since the two velocity are opposite to each other, the average velocity will be:
Average velocity = (-24.68 + 184.83)/2
Average velocity = 160.15/2
Average velocity = 80.08 km/h
Therefore, his average velocity during the trip is 80.08 km/h