Question

A force of 20 newton is applied on a body which is initially at rest calculate its momentum after 1.5 seconds

Answer 1

we know that the rate of change of momentum is called the force

∆p/∆t= F
now
p = 20(1.5-0)

p= 3 kgm/s

Answer 2

Change in momemtum / change in time= force
Momentum=force*time
=20*1.5
=30Ns