Question

A car of 200kgchange its speed from 72kg/h . Calculate the change in momentum

Answer 1

we know that,

a car of mass =200kg

speed=72km/h

         =72x1000/3600

         = 20m/s

to find the momentum,

we know that,

the product of mass and velocity is called momentum.

p=mxv.

first we find average velocity=u+v/2

                                               = 10m/s

p=mxv

p=72x10

p=720kgm/s