JEE Main 2016 Physics question

Physics Systems of Particles and Rotational Motion JEE Main 2016

A neutron moving with a speed 'v' makes a head on collision with a stationary hydrogen atom in ground state. The minimum kinetic energy of the neutron for which perfactly inelastic collision will take place is :

(1) eVCorrect
(2) eV
(3) eV
(4) eV

Answer: (1)

Solution

A neutron and a hydrogen atom have essentially the same mass. In a perfectly inelastic head-on collision between equal masses, the two move off together with half the initial speed, so the kinetic energy retained is — exactly **half** the initial kinetic

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Question ID VK-115609