What is the change in momentum of a car weighing 1500 kg when its speed increases from 36 km/h to 72 km/h uniformly?

Question

Philoid · Accepted Answer

The formula of change in momentum= mv - mu,

Where m = mass i.e. 1500kg,

v = final velocity i.e. 72 km/hr,

u = initial velocity i.e. 36 km/hr.

We will change the v and u to m/s

i.e. 72 X 5/18=20 m/s and 36 X 5/18=10 m/s.

Hence, change in Momentum= mv - mu

= 1500X20 - 1500X10

=1500[20 - 10]

= 1500 X 10

= 15000 kg m/s