THE PRACTICE STUDIO
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PRACTICE / Rotational kinetic energy
Work done while turning
A constant net torque of 3 N·m turns a rotor through 4 radians from rest.
Find its final rotational kinetic energy.
Organize the givens & assumptions
- τ = 3 N·m
- Δθ = 4 rad
- initial K = 0
Rigid rotor about a fixed axis; constant net torque aligned with rotation; begins at rest.
- A
- B
- C
- D
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