JEE Advanced 2007 Physics question

STATEMENT-1 : In an elastic collision between two bodies, the relative speed of the bodies after collision is equal to the relative speed before the collision. because STATEMENT-2 : In an elastic collision, the linear momentum of the system is conserved.

(A)Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1
(B)Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1Correct
(C)Statement-1 is True, Statement-2 is False
(D)Statement-1 is False, Statement-2 is True (this is also correct)

Answer: (B)

Solution

Statement-2 is true: momentum is conserved in every collision of an isolated system. Statement-1: in the centre-of-mass frame the two momenta are equal and opposite; conservation of kinetic energy then keeps each speed unchanged, so the magnitude of the relative velocity is the same before and after an elastic

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-037414