Question

If the speed of an object in uniform circular motion is tripled, the magnitude of the...

If the speed of an object in uniform circular motion is tripled, the magnitude of the centripetal acceleration increases by a factor of :

A. 2

B. 3

C. 9

D. 6

E. 8

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Homework Answers

Answer #1

Centripetal acceleration,   ,where is the speed and is the radius

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If the speed is tripled, then new speed,

Since it is not given let's assume that radius remains the same.

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New centripetal acceleration,

The magnitude of centripetal acceleration will increase by a factor of 9.

ANSWER: Option C. 9

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