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NEET2014PhysicsCenter of Mass, Momentum and CollisionActual

A heavy truck moving with a velocity of 60 ~km ~h ⁻¹ collides with a light drum at rest. If the collision be elastic, then the velocity of the drum immediately after collision will be

Options

  1. Azero
  2. B60 ~km ~h ⁻¹
  3. C120 ~km ~h ⁻¹
  4. Duncertain

Correct answer

C. 120 ~km ~h ⁻¹

Step-by-step solution

In an elastic collision of a very heavy body with a very light body at rest, the speed of lighter body becomes twice the speed of the heavier body, i.e., v₂=2 u₁=120 ~km ~h ⁻¹ .

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