Question

8.
A perfectly elastic ball P, of mass m moving with velocity v collides elastically with three exactly similar
balls P2, P3, P4 lying on a smooth table as shown. Velocities of the four balls after the collision are
1) V, V, V, V
2) 0, 2v, 3v, 4v
3) 0, 0, 0, v
4) 0, 0, 0, 0​

Answer 1

Answer:

option 3 is correct

Explanation:

in perfectly elastic ball momentum conservation rule follow when all ball mass is equal firstly get 2 ball p1 mass m and velocity v and p2 in rest so after collision p1 in rest and it's velocity transfer into ball p2 then this process continue till last ball so last ball get velocity v and another are in rest

Answer 2

Answer:

3) 0, 0, 0, v

Explanation:

After a perfectly elastic collision, P1 collides with velocity v and comes to rest, the velocity transfer to P2 and again P2 transfer velocity to P3, P3 transfer velocity to P4 and P4 moves with velocity v and other three balls comes to rest.