Q. A neutron moving with velocity v collides with a stationary $\alpha - particle$.The velocity of the neutron after the collision is
A) $- \frac{3v}{5}$
B) $\frac{3v}{5}$
C) $\frac{2v}{5}$
D) $- \frac{2v}{5}$
Explanation
(a) $v' = \left( \frac{m_{1} - m_{2}}{m_{1} + m_{2}}\ \right)v$
$\left( \frac{1.008665 - 4.002603}{1.008665 + 4.002603} \right) \approx - \frac{3}{5}v$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.