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

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?