Question

A nucleus moving with a velocity v emits an α-particle.
Let the velocities of the α-particle and the remaining nucleus
be v ⃗₁ and v ⃗₂ and their masses be m₁ and m₂.
(a) v ⃗, v ⃗₁ and v ⃗₂ must be parallel to each other
(b) None of the two of v ⃗, v ⃗₁ and v ⃗₂ should be parallel to
each other
(c) m₁ v ⃗₁ +m₂v ⃗₂ must be parallel to (m₁ + m₂ )v ⃗ .
(d) None of these

Answer 1

Answer:

I thought c option is correct answer

thanks