Question

a boy of mass 50 kg running 10 metre per second jumps on the 50 kg trolley travelling in same direction at 3.0 metre per second find their common velocity.​

Answer 1

Answer:

6.5m/s

Step-by-step explanation:

=>Boy Mass = 50kg

=>boy Velocity = 10m/s

=>Mass = 50 kg

=>Velocity = 3 m/s

so using conservation law of momentum

=>MV + mv = ( M + m ) v'

=>50*10 + 50*3 = ( 50 + 50 ) v'

=>500+150 = 100V

=>650=100v

=>v=6.5m/s