Question

The velocity of a body of mass 2 kg as a function of t is given by v(t)=2ti^ + 2j^. Find the force acting on it at t =2s​

Answer 1

Acceleration = dv/dt

d(2t i^ + 2j^)/dt= 2i^ + 0j^

So |a|=2

Hence force = 2*2=4N