A neutron moving with velocity u collides elastically with an atom of mass number A. If the collision is head on and the initial kinetic energy of neutron is E, then the final kinetic energy of the neutron after collision is
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a
A+1A−12E
b
A−1A+12E
c
A−1A+1E
d
A+1A−1E
answer is B.
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Detailed Solution
Final KE when one is at rest and other doing elastic collisinm2−m1m2+m12E=A−1A+12E