Question

Can anyone solve this for me with full explanation..​

Answer 1

Answer:

Let mass of a single nucleon be m .

Now mass of nucleus since it has A nucleons will be mA .

Now a proton left nucleus so new mass will be

( A - 1 ) m .

Use linear momentum conservation

$( A - 1 ) m u = mv \\ v = u( A - 1 )$