A dancer moves counterclockwise at constant speed around path shown below. path is such th

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2.Motion in Straight Line

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A dancer moves counterclockwise at constant speed around the path shown below. The path is such that the lengths of its segments, $PQ, QR, RS$, and $SP$, are equal. Arcs $QR$ and $SP$ are semicircles. Which of the following best represents the magnitude of the dancer’s acceleration as a function of time $t$ during one trip around the path, beginning at point $P$ ?

A

B

C

D

Solution

In the straight sections there is no acceleration, in the circular sections, there is a centripetal acceleration

Standard 11

Physics

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