COMEDK · Physics · 7. Center of Mass Momentum and Collision
A neutron makes a head on elastic collision with a lead nucleus. The ratio of nuclear mass to neutron mass is 206 . The fractional change in kinetic energy of a neutron is
- A 2% increase
- B 3% increase
- C 2% decrease
- D 3% decrease
Answer & Solution
Correct Answer
(C) 2% decrease
Step-by-step Solution
Detailed explanation
Let \(m\) be the mass of the neutron and \(M\) be the mass of the lead nucleus. Given \(M = 206m\). In a head-on elastic collision, the final velocity \(v_1'\) of the neutron is given by \(v_1' = \dfrac{m - M}{m + M} v_1\), where \(v_1\) is the initial velocity of the neutron.…
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