Power In Rotation
Rotational power delivered by torque τ at angular speed ω equals?
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About This Question
- Subject
- physics
- Chapter
- rotational motion
- Topic
- power in rotation
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
τ ω
- Definition of Power: Power is the rate of doing work (P=dW/dt).
- Work Formula: We know dW=τdθ.
- Differentiation:
- P=dtdW=τdtdθ.
- Substitute Variable: Since dθ/dt=ω (angular velocity):
- P=τω.
- Conclusion: Rotational power is the product of torque and angular velocity (P=τω).
This medium difficulty physics question is from the chapter rotational motion, covering the topic of power in rotation. It appeared in the 2025 exam.
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