A man stands with his hands to his sides on a frictionless platform that is rotating. Which of the following could change the angular momen- tum of the man-platform system?
A.
The man catches a baseball thrown to him by a friend.
B.
The man thrusts his arms out away from his body.
C.
The man thrusts his arms out away from his body, and then quickly brings his arms back to his side again.
D.
The man jumps straight up in the air and
Exam No：AP Physics 1 Problem Set 1 Year：2024 Question No：45
Answer:
A
Knowledge points:
7.4 Conservation of Angular Momentum
Solution:
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