Physics WAEC

A stone tied to a string is made to revolve in a horizontal circle of radius 4m with an angular speed of 2 rad per sec. With what tangential velocity will the stone move off the circle if the string is cut?

A. 16.0 ms−¹
B. 8.0 ms−¹
C. 6.0 ms−¹
D. 2.0 ms−¹
E. 0.5 ms−¹

Correct Answer:

Option B – 8.0 ms−¹

Explanation

V = wr = 2×4 = 8.0 ms-1

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