- Energy that is stored due to the position of an object may be called ____ energy.
- kinetic
- potential
- radiant
- nuclear

- A 20-kilogram object falls 2.0 meters to the floor. At what point in its fall does the kinetic energy of a body equal its potential energy?
- At all points of the fall
- Very nearly at the top of the fall
- Halfway to the floor
- Just the instant before it hits the floor

- An object falls without friction near Earth’s surface. The loss of its potential energy is equal to its ____.
- loss of height
- loss of mass
- gain in kinetic energy
- gain in velocity

- The ability to cause change is defined as ____.
- force; measured in newtons
- power; measured in watts
- energy; measured in joules
- impulse; measured in newton-seconds

- Potential energy increases as a marble ____.
- slows rolling up an incline
- increases speed down an incline
- rolls at uniform speed on a level table
- sits motionless on the floor

What does the value “70-kilogram” represent?- mass
- change in height
- force
- change in speed

What does the value “2.0 meters” represent?- mass
- change in height
- force
- change in speed

What is*g*?- the acceleration due to gravity
- about 10 m/s^2 down
- about -10 m/s^2
- all of these

Which equation would allow you to calculate the potential energy of the barbell?- red
- green
- blue
- purple

The increase in the barbell’s potential energy is about ____.- 35 joules
- 140 joules
- 350 joules
- 1,400 joules

What does the value “0.25-kilogram” represent?- mass
- distance
- force
- speed

What does the value “2.5 meters per second” represent?- mass
- distance
- force
- speed

Which equation would allow you to calculate the mechanical kinetic energy of the rolling ball?- red
- green
- blue
- violet

The amount of mechanical kinetic energy possessed by the rolling ball is ____ joules.- 0.31
- 0.63
- 0.78
- 1.6

- If the speed of a moving object doubles, the amount of mechanical kinetic energy that it possesses ____.
- increases by two times
- increases by four times
- decreases by two times
- decreases by four times

- If the speed of a moving object triples, the amount of mechanical kinetic energy that it possesses ____.
- increases by three times
- increases by nine times
- decreases by three times
- decreases by nine times

- When the brakes are fully applied, compared to the energy required to stop a car going 30 miles per hour, the energy needed to stop a car going 90 miles per hour is ____.
- 3 times as great
- 6 times as great
- 9 times as great
- the same

- An object that has kinetic energy must be ____.
- falling
- at an elevated position
- at rest
- moving

- Two objects, A and B, have the same size and shape, but A is twice as heavy as B. When they are dropped simultaneously from a tower, they reach the ground at the same time, but A has greater ____.
- acceleration
- kinetic energy
- speed
- all of these