Q783
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
AnswerD.
Sit down with raised hands
Answer: Option C
Solution
Answer: Option C
Solution:
When a person on a turn table will raise his hands, there will be increase in the momentum of inertia. Hence, the angular velocity of the turntable will decrease.