Q.

What should a person on a freely rotating turn table do to decrease his (angular) speed?

A. Bring his hands together
B. Raise his hands up
C. Spread his hands outwards
D. Sit down with raised hands
Answer» C. Spread his hands outwards
Explanation: The answer is related to the conservation of angular momentum. The person on the rotating table will maintain approximately the same angular momentum during the spin. If he moves his arms in, it will reduce the rotational inertia by reducing the distance of the mass of her arms and hands from the axis of rotation.
3.1k
0
Do you find this helpful?
23

View all MCQs in

Physics

Discussion

No comments yet