Two physics students are sitting on a spinning merry-go-round. One 1 pc student measures the time it takes the merry go round to make a full rotation, and shows that the time to make a rotation is remaining constant. He remarks that his acceleration is zero because his speed is remaining constant. Is the student correct or incorrect, and why? * The student is incorrect because an object with circular motion has a velocity that is constantly changing direction. The student is incorrect because the merry-go-round needs to start and stop every time it goes around the circle, therefore he is accelerating. The student is correct because acceleration must only occur in a straight line. The student is correct because the final speed minus the initial speed divided by the time is the correct relationship for this situation.

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