Question

A boy of mass 60 kg running at 3 m/s jumps on to a trolley of mass 140 kg moving with velocity of 1.5 m/s in the same direction. With what velocity will the two moves together ?​

Answer 1

Answer:

This question is based on conservation of momentum...

initial momentum= final momentum..

common velocity means both trolley and boy moves with same velocity..

initial momentum=60×3+140×1.5

=180 + 210

=390 kgm/s

final momentum=(60+140)V

200V

so on equating..

200V=390

V=390/200=1.95m/s...

Answer 2

Answer:

or kaise hoo

shivam ji..

sb badiyaa