Exam-style question
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A flywheel is used to store energy in a machine. When the flywheel is released, which statement best describes the energy transfer?.
- A.The flywheel converts its kinetic energy into potential energy.
- B.The flywheel converts its kinetic energy into thermal energy only.
- C.The flywheel converts its kinetic energy into useful mechanical work.
- D.The flywheel converts its kinetic energy into chemical energy.
Model answer
What a good answer should say
- The flywheel converts its kinetic energy into useful mechanical work.
Explanation
Why this works
A flywheel stores rotational kinetic energy; when released, that energy is transferred to the machine as useful work, illustrating conservation of energy in a rotating system.
Common mistake
No common mistake is linked to this question yet.