On applying a constant torque on a body :
Mark the correct statement(s) (1) If speed of a body is varying, its velocity must be varying and it must have non-zero acceleration.
(2) If velocity of a body is varying, its speed must be varying.
(3) A body moving with varying velocity may have constant speed.
(4) A body moving with varying speed may have constant velocity, if its direction of motion remains constant.
A body moves with constant angular velocity on a circle. Magnitude of angular acceleration
An external device supplies constant power to a rotating system by applying a torque τ. The angular velocity of system varies with torque τ as (ω∝)