# A body rotating at 20 rad s-1 is acted upon by a constant torque providing it a deceleration of…

Q: A body rotating at 20 rad s-1 is acted upon by a constant torque providing it a deceleration of 2 rad s-2. At what time will the body have kinetic energy as the initial value if the torque continues to act ?

(a) 20 s

(b) 15 s

(c) 10 s

(d) 25 s

Ans: (a)