Exam-style question
Try this first
If a motor supplies a constant torque to a flywheel, which statement best describes the power output of the motor as the flywheel speeds up?.
- A.Power output decreases as angular speed increases.
- B.Power output remains constant.
- C.Power output increases as angular speed increases.
- D.Power output is unrelated to angular speed.
Model answer
What a good answer should say
- Power output increases as angular speed increases.
Explanation
Why this works
Power = τω; with constant torque τ, power is proportional to angular speed ω, so it rises as the flywheel accelerates.
Common mistake
No common mistake is linked to this question yet.