Energy Answers

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What type of energy is the sum of an object’s potential and kinetic energy?

A
mechanical energy
B
electromagnetic energy
C
chemical energy
D
thermal energy
3

An arrow is fired at a target on a high wall. How does the energy change between the moment the arrow is fired and the moment it hits the target?

A
The potential energy and kinetic energy remain the same.
B
The potential energy decreases as kinetic energy increases.
C
The kinetic energy decreases as potential energy increases.
D
The kinetic energy remains at zero, but potential energy increases.
4

According to the law of conservation of energy, what will most likely happen in a closed system?

A
Energy will be exchanged along with matter.
B
Energy will be exchanged, but matter will not be exchanged.
C
Energy will be created along with matter.
D
Energy will be destroyed, but matter will not be destroyed.
6

Which energy change best relates to a boulder that is rolling down the side of a hill?

A
potential energy transforming into kinetic energy
B
mechanical energy transforming into thermal energy
C
potential energy transforming into electromagnetic energy
D
mechanical energy transforming into electromagnetic energy
8

Which scenario would adhere to the law of conservation of energy?

A
Energy is created when water freezes.
B
Energy is destroyed when sugar is burned.
C
Energy stays inside molecules permanently.
D
Energy is transferred when atoms are rearranged.
10

A cyclist eats a full meal before going to ride a bike for 2 hours. Which energy transformation happens during this process?

A
Chemical energy turns into mechanical energy.
B
Kinetic energy turns into potential energy.
C
Thermal energy turns into electromagnetic energy.
D
Potential energy turns into chemical energy.

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