JEE Main Physics question

Which one of the following statements does not hold good when two balls of masses m₁ and m₂ undergo elastic collision?

(A)When m₁ << m₂ and m₂ at rest, there will be maximum transfer of momentum
(B)When m₁ >> m₂ and m₂ at rest, after collision the ball of mass m₂ moves with four times the velocity of m₁Correct
(C)When m₁ = m₂ and m₂ at rest, there will be maximum transfer of kinetic energy
(D)When the collision is oblique and m₂ at rest with m₁ = m₂, after collision the balls move in opposite directionsCorrect

Answer: (B),(D)

Solution

For m₁ >> m₂ (target very light) and m₂ at rest, the target moves off with double (not four times) the velocity of the incoming ball, so statement (B) does not hold good. For an oblique elastic collision between equal masses with

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Question ID VK-154200