A boy on a bicycle rides in a circle of radius ro at speed vo. If...

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A boy on a bicycle rides in a circle of radius ro at speed vo. If...

A boy on a bicycle rides in a circle of radius ro at speed vo. If the boy rides at a radius equal to half the radius ro, by what factor must he change his speed in order to have the same centripetal acceleration?

A. 0.25

B. 4

C. 0.71

D. 2

E. 1.4

F. 0.5

science physics

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