The position-time graph of a body of mass 2 kg is as given in figure. What is the impulse on the body at t = 0 s and t = 4s.

Explanation

Mass of body =2 kg
From graph given at x= 0 body is at rest s= 0
v= 0
impulse of force = 0
in time interval t=0 to t = 4 sec
`x to` graph is a straight line means body mvoes with constant velocity
Impulse at t=5 second change in momentum
`=2 (0 - (3)/(4 ))`
`=(3)/(2) kg - m//s =-1.5 kgm//s`