SAT Subject Physics Practice Question 644: Answer and Explanation

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Question: 644

10. Two children are riding a merry-go-round. Child (P) rides on a pony on the outside rim of the merry-go-round, while Child (L) rides a lion on the inside rim of the merry-goround. At the end of the ride, which of the following statements is true?

A. Child (P) had the largest angular displacement.
B. Child (L) had the largest tangential displacement.
C. Child (P) had the largest tangential velocity.
D. Child (L) had the largest angular velocity.
E. Child (L) had the largest linear acceleration

Correct Answer: C

Explanation:

The correct answer is (C). The tangential velocity is the product of the angular velocity and the radius of the object or the person from the center of the rotating device. Both children have the same angular velocity, but the child on the pony is farther from the center of the merry-go-round.

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