A force of 5 ~N acts on a body initially at rest. If the instantaneous power due to the force at the end of the third second (t=3 ~s ) is 5 ~W , then the mass of the body is

Step-by-step solution

Force acting on body, F=5 ~N Instantaneous power, P=5 ~W Acceleration in the body due to applying force F , a= F m = 5 m where, m is mass of body Velocity of body at t=3 ~s , aligned & & v=0+a t= 5 m 3 & v & = 15 m aligned Power, P=F v array ll & 5=5 15 m & m=15 ~kg array