MHT CET 2025 Physics question
There is head-on elastic collision between the two particles moving in the same direction with speeds 5 m/s and 3 m/s respectively. After collision, the velocity of the first particle becomes 4 m/s in the same direction. The velocity of the second particle should be
Answer: (A)
Solution
In a head-on elastic collision the coefficient of restitution is 1: the relative speed of separation equals the relative speed of approach, whatever the masses. Before: m/s. After: . Setting gives m/s in the same direction, option (A). (Momentum
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