Question

two identical balls A and B having velocities of 0.5m/s and -0.3m/s respectively collide elastically in one dimension the velocities of B and A after collision respectively will be

Answer 1

For elastic collision, both momentum and kinetic energy would be conserved.

when the mass of the two bodies are equal, the final velocities are given by:

v₂' = v₁

v₁' = v₂

Initial velocity of the balls is given by:

v₁ = 0.5 m/s

v₂ = -0.3 m/s

Therefore, final velocity is given by:

v₂' = v₁ = 0.5 m/s

v₁' = v₂ = -0.3 m/s

Answer 2

Answer: final velocity for A, v1= -0.3m/s

Final velocity for Being, v2= +0.5m/s

Explanation: initial velocity of A, u1= +0.5m/s

Initial velocity of B, u2= -0.3m/s

Now since the collision is head on elastic collision, therefore after the collision,

u1 = v2

u2 = v1

Hence, v1= -0. 3m/s and v2= +0.5m/s