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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

A neutron moving with velocity v collides with a stationary α-particle. The velocity of the neutron after the collision is

Answer: (A)

Solution

Elastic collision, neutron mass ≈1, α-particle mass ≈4: v₁' = [(1−4)/(1+4)]v = −3v/5.

Question ID VK-153682