Question

a force of 10 newton acts on a body of mass 20 kg for 10 seconds the change in its momentum is

Answer 1

  force=change in momentum/time

=>10=x/10

=>×=100Ns [or] 100kgm/s

Answer 2

Force =mass × acceleration

10= 20×acceleration

Acceleration = 1/2

Acceleration = v- u/ t= v- u/10

V-u=10× 1/ 2

V-u = 5

Change in momentum = m(v-u)

20(5)=100kg× m/ s