Question

A boy of mass 60 kg running at 3 m/s jumps on to a trolley of mass 140 kg moving with a velocity of 1.5 m/s in the same direction. What is their common velocity?​

Answer 1

Explanation:

your answer is in the attached file

Answer 2

Answer:

Hey mate ☺️ ❤️

this question is based on conservation of momentum...

initial momentum= final momentum..

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

now..

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

Hope it will be helpful to you

Thanks ☺️❤️✌️