Unit Test — Unit test Answers
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Eddie and Val observed the picture of an athlete running in a race.
A
Only Eddie is correct because the picture does not show a transformation that starts with chemical energy.B
Only Eddie is correct because the picture does not show a transformation that ends with mechanical energy.C
Both Eddie and Val are correct because chemical energy is a type of potential energy and mechanical energy includes kinetic energy.D
Both Eddie and Val are correct because chemical energy is a type of kinetic energy and mechanical energy includes potential energy.22
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Plants are responsible for a very important energy transformation, as shown.
A
radiant to chemicalB
nuclear to mechanicalC
chemical to thermalD
mechanical to chemical23
An object has a velocity of 8 m/s and a kinetic energy of 480 J. What is the mass of the object? (Formula: )
A
7.5 kgB
15 kgC
60 kgD
120 kg24
Ella has a mass of 56 kg, and Tyrone has a mass of 68 kg. Ella is standing at the top of a skateboard ramp that is 1.5 meters tall. Which conclusion is best supported by the given information?
A
If Tyrone stands at the top of the same ramp, his potential energy will be less than Ella’s.B
If Tyrone stands at the top of a 1 m high ramp, his potential energy will be greater than Ella’s.C
If Tyrone stands at the top of the same ramp, his potential energy will be the same as Ella’s.D
If Tyrone stands at the top of a 2 m high ramp, his potential energy will be greater than Ella’s.25
Taro stated that when someone hits a golf ball with a club, the amount of energy the ball has changes, the amount of energy that the club has changes, and the total energy of the system that includes the ball and the club increases. Which best explains Taro’s error?
A
The amount of energy that the ball has does not change.B
The amount of energy that the club has does not change.C
The total energy of the system remains the same.D
The total energy of the system decreases.Did you find these answers helpful?
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