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20 questions
What is the unit for energy?
joule
newton
watt
m/s/s
Which of the following is NOT a representation of the correct units for energy?
J
N∙m
kg∙m^{2}/s^{2}
W
Mechanical energy is the sum of an object’s kinetic energy and any potential energies.
True
False
What are two things required for work to be done? Check all that apply.
Force
Distance
Constant Speed
Momentum
At which point on the roller coaster is the kinetic energy at its maximum?
A
B
C
D
As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy?
The PE and KE increase and decrease together
The PE decreases while the KE increases
Impossible to know without knowing the mass
The KE decreases while the PE increases
Two balls, a bowling ball and a baseball, are both traveling with a velocity of 10 m/s. Which ball has the greater kinetic energy?
The bowling ball
The baseball
They have the same
Neither has kinetic energy
A water balloon is launched off a building. Where in its trajectory does it have the most kinetic energy?
As soon as it is released
At the peak of its trajectory
Just before it hits the ground
Once it comes to rest on the ground
A roller coaster whose average speed is 32 m/s is at the top of a 72m hill and weighs 966N. At the top of the hill the coaster car has ___________________ energy.
only kinetic energy
only potential energy
mostly kinetic energy
both kinetic and potential energy
How could you increase the gravitational potential energy of an object without changing its mass and gravity?
Make the object larger
Lower the object towards the ground
Raise the object farther off the ground
Allow the object to roll on the ground
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