Question

Answer the question in the attachment
it's urgent be fast please tomorrow is my exam​

Answer 1

option (b) is the right

Explanation:

as per the question , the third part of mass 2m will move because the total momentum of the system after explosion must remain zero .

the velocity of third part v`

according to law of conservation of momentum ,

√2(mv) = 2m × v`

v` = v / √2

the total kinetic energy generation by explosion,

1/2mv²+1/2mv²+ 1/2 (2m) v`²

mv²+mv²/2

3/2mv²