Question

find the change in momentum of car weighing 1500 kg when its speed increases from 36 km per hour to 72 km per hour uniformly

Answer 1

m=?

weight-1500kg

1500/1ooo x 36x5/18

=5

1500/1ooo x 72 x5/18

=10

formula

f=m-a

10-5

5m/s

k/m is change into m/s by 5/18

Answer 2

change in momentum = initial momentum - final momentum
change in momentum = mu -mv
= m(u-v)
=1500(36-72)
=1500(-36)
=-54000 km^2/hour
converting it into m^2/s
-54000×5/18
=-3000×5
=-15000m^2/s