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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

Two particles of masses and in projectile motion have velocities and respectively at time . They collide at time . Their velocities become and at time while still moving in air. The value of is

Answer: (C)

Solution

Gravity is the only external force throughout (the inter-particle collision force is internal/impulsive, acting only momentarily at ). Taking the bracketed

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Question ID VK-158655