Question

An object of mass M, moving horizontally with
speed u collides elastically with another object of
mass M, at rest. Select correct statement.
P
-----
.--
----Q
(1) The momentum of system is conserved only in
direction PQ
(2) Momentum of M, is conserved in direction
perpendicular to SR
(3) Momentum of M, will change in direction
normal to CR
(4) All of these​

Answer 1

Explanation:

(1) The momentum of system is conserved only in

direction PQ