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in Physics by (70.5k points)

What is the centripetal acceleration of an object (mass = 50 g) on the end of an 80-cm string rotating at a constant rate of 4 times a second? 

(A) 25m/s

(B) 32m/s2 

(C) 100m/s

(D) 500m/s2 

(E) 2500m/s2 

1 Answer

+1 vote
by (70.7k points)
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Best answer

Correct option (D) 500m/s2

f = 4 rev/sec. a = v2/r and v = 2πrf

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