Question

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

Answer 1

here is your answer

given :

mass = 1500 kg

initial velocity (u) = 36 km/hr = 36*(5/18) = 10 m/s

final velocity (v) = 72 km/hr = 72*(5/18) = 20 m/s

to find : change in monentum

solution :

change in momentum = final momentum - initial momentum

change in momentum = mv-mu

change in momentum = m(v-u)

change in momentum = 1500(20-10)

change in momentum = 1500*10

change in momentum = 15000 kgm/s

so, the change in momentum is 15,000 kgm/s.