Question

a boy of mass 60 kg running at 3m/s jumps on to a trolley of mass 140 kg moving with a velocity of 1.5m/s in the same direction. what is their common velocity. please answer this question.

Answer 1

"The initial momentum of the system = momentum of the boy + momentum of the trolley = (60 x 30) + (140 x 1.5)

Delta P1 = 180 + 210 = 390 Ns

Final momentum of the system delta P2 = mass of the body and trolley x common velocity

Delta P2 = (60 + 140)v = 200 v

By the law of conservation of momentum,

Delta P1 = Delta P2

390 = 200v

V = 1.95 m/s

"

Answer 2

Answer:

he have to go to doctor

Explanation: