NEW
Font size
WorksheetsPhysics Energy, Work, & Power Practice
Total questions: 23
Worksheet time: 12mins
Two equal mass marbles are at the top of a ramp. Marble A falls to the ground off the back while marble B rolls down the ramp. Compared to marble A at the bottom marble B at the bottom has ___potential energy, ___kinetic energy, and ____speed.
The marble that rolled down the ramp is moving faster than the marble that fell.
The marble that fell down the back of the ramp is moving faster than the marble that rolled.
The marble that rolled down the ramp is not moving when it reaches the ground.
The two marbles are moving with the same speed.
Potential energy is associated with ---.
speed
position
direction
temperature
Kinetic energy is associated with ---.
speed
position
direction
temperature
A block starts at rest at point P at the top of a ramp which is height h above the ground. The block slides down one side and up the other, stopping at a point less than h above the ground.
The block did not go as high on the other side because gravity pulls down.
The block did not go as high on the other side because potential energy always has to decrease.
The situation as described is impossible to happen.
The block did not go as high on the other side because work from friction made the mechanical energy less.
If there is no friction on this track, at which point would the coaster have the most kinetic energy?
A
B
C
D
The roller coaster will gain potential energy from points__
A to B
B to C
C to D
The roller coaster is always losing potential energy
When external forces like an applied force, friction force, or drag force act on a system of objects they __
have no effect on a system's mechanical energy.
convert kinetic energy into potential energy.
convert potential energy into kinetic energy.
convert between mechanical energy and other forms of energy to change the total mechanical energy of the system.
When energy is conserved, something that is falling will experience a ____ in/of kinetic energy and a______ in/of gravitational energy _____ and its kinetic energy ____
loss; gain
loss; loss
gain; gain
gain; loss
A car starts from rest and accelerates to a velocity of 5 m/s. As the car rolls along a horizontal road, its gravitational energy __ and its kinetic energy ___
remains the same; increases
increases; increases
remains the same; decreases
increases; decreases
When work is done by friction the total mechanical energy ___ and kinetic energy coverts into ___ energy
remains the same; gravitational
decreases; gravitational
remains the same; thermal
decreases; thermal
In order to change the total mechanical energy of a system of objects a force of ____ must be applied.
gravity
friction
velocity
momentum
The law of Conservation of Energy states that energy cannot be _____ or _____. For an isolated system the toilet mechanical energy ___
created, destroyed, increase
created, transformed, is conserved
created; destroyed, is conserved
transformed; destroyed; increases
To do work a ____ must be applied to change an object's _____. to generate power, ___ must be done over a certain _____
force; time; work; acceleration
force, acceleration, work, distance
force, distance, work, time
force, time, work, distance
In order to do work, force and distance must be ___ or _____. if they are ____ no work is done.
perpendicular, parallel, anti-parallel
perpendicular, anti-paralle, parallel
parallel, anti-parallel, perpendicular
Assume mass is constant. Gravitational energy is____ proportional to height. Kinetic energy is ____ proportional to the square of velocity. Power is ___ proportional to time.
directly; directly; inversely
directly, inversely, directly
directly, directly, directly
inversely, directly, inversely
you and your friend race up a hill. You take the straight path to the hill's peak your friend the winding path to the peak. You do ___ work as/then your friend. if you reach the peak first, you generate ___ power
the same, less
less, less
less, more
the same, more
A 1.0-kilogram book resting on the ground is moved 1.0 meter at various angles relative to the horizontal. In which direction does the 1.0-meter displacement produce the greatest increase in the book’s gravitational potential energy?
less
greater
the same
A wound spring provides the energy to propel a toy car across a level floor. At time ti,the car is moving-at speed vi across the floor and the spring is unwinding, as shown below. At time tf, the spring has fully unwound and the car has coasted to a stop.
Gravitational potential energy at ti is converted to internal energy at tf.
Elastic potential energy at ti is converted to kinetic energy at tf
Both elastic potential energy and kinetic energy at ti are converted to internal energy at tf
Both kinetic energy and internal energy at ti are converted to elastic potential energy at tf.
In the diagram below, an ideal pendulum released from position A swings freely to position B. As the pendulum swings from A to B, its totalmechanical energy
decreases, then increases
increases, only
increases, then decreases
remains the same
A 250.-kilogram car is initially at rest at point A on a roller coaster track. The car carries a 75-kilogram passenger and is 20. meters above the ground at point A. Compare the total mechanical energy of the car and passenger at points A, B, and C
The total mechanical energy is less at point C than it is at points A or B
The total mechanical energy is the same at all three points
the total mechanical energy is greatest at point a
The total mechanical energy is greatest at point B
The diagram represents the orbit of a comet about the sun. as the comet moves from point A to point B, its potential energy
decreases
increases
remains the same
A 3.0-kilogram object is placed on a frictionless track at point A and released from rest.(Assume the gravitational potential energy of the system to be zero at point C.) Which letter represents the farthest point on the track that the object will reach?
G
C
D
H
