Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

A nucleus is at rest in the laboratory frame of reference. Show that if it disintegrates into two smaller nuclei, the products must be emitted in opposite


CLASS - XI PHYSICS (Laws of Motion)


The nucleus is at rest i.e. v1=0 
let mass of nucleus be M and mass of a disintegrated part be m.
so the mass of the other part is M-m.
if the two parts have velocities v' and v'' repectively , then
by Law of conservation of linear momentum, we get
Mv1 = mv' + (M-m)v''
or, v' = -{ (M-m)/m}v''
Due to positive values of M-m and m, we can conclude that v' and v'' have opposite signs , i.e. the two disintegrated parts have velocities opposite in direction .
Hence Proved
0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts