Question

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

Answer 1

GIVEN,

MASS, m = 1500 kg

INITIAL VELOCITY,u = 36 km/h = 36*5/18 = 10 m/s

FINAL VELOCITY ,v = 72 km/h = 72*5/18= 20 m/s

FORMULA :

CHANGE IN MOMENTUM,p = mv - mu

1500*20 - 1500*10

30000 - 15000

= 15000 kg m/s