Question

A body of mass m having an initial velocity v,
makes head on collision with a stationary body of
mass M. After the collision the body of mass m
comes to rest and only the body having mass M
moves. This will happen only when
(1) m >>M

(2) m <<M
(3) m
= M
(4) m=-M​

Answer 1

Explanation:

whenM=m because as per energy conservation

if didn't get then lemme know

Answer 2

Answer:

m M

v=u u=0

m1/M2=u1/u2

m1/M2=1

m1=M2

mM