Question

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

Answer 1

Answer:

Explanation:

m1=60kg,u1=3m/s,m2=140kg,u2=1.5m/s

By conservation of linear momentum :

m1u1+m2u2=(m1+m2)v

60*3+140*1.5=(60+140)v

v=180+210/200

v=390/200

v=1.95m/s

Common velocity is 1.95m/s

I hope this will help you...