Question

Two bodies of same mass undergoes headon elastic collision then
a) Their velocities are interchanged
b) Their speeds are interchanged
c) Their momenta are interchanged
d) All the above
​

Answer 1

THE CORRECT ANSWER IS

D) ALL THE ABOVE

REASON :-

For a head-on collision with a stationary object of equal mass, the projectile will come to rest and the target will move off with equal velocity. Hence, the velocities are interchanged i.e. the speeds are interchanged which in turn interchanges the momentum.