question_answer

Nucleus of mass number A, originally at rest, emits the a-particle with speed v. The daughter nucleus recoils with a speed of

A) 2v/(A + 4)          

B)  4v/(A + 4)

C)  4v/(A-4)             

D) 2v/(A - 4)

Correct Answer: C

Solution :

According to conservation of momentum \[y=k{{t}^{2}},\]Ö\[k=1m/{{s}^{2}}.\]Ö\[{{T}_{2}},\]