Question

A boy of mass M is standing on a wooden plank of mass m on a smooth horizontal floor. The boy jumps toward right with a horizontal velocity v. The magnitude of velocity of plank just after the jump is

Answer 1

the answer to this is one should divide the horizontal velocity by the mass you will get the answer that is equal to M divided by v that is mass divided by velocity

Answer 2

Answer:

Mv /m

Explanation:

According to conservation of linear momentum ,

m1v1= m2v2

Here, m1= mass of boy = M. & v1= v (given)

and,. m2=mass of plank= m. & v2= ?

So,.

v2= m1v1/m2

> v2= Mv/ m