A sphere of mass 3 kg moving with a velocity of 2 ms- collides head-on with another sphere of mass 4 kg moving in opposite direction with a velocity of 1 ms. After collision if they stick together and move with a velocity v, find (i) the total initial momentum and (ii) the value of velocity v.

A sphere of mass 3 kg moving with a velocity of 2 ms- collides head-on

1.	A sphere of mass 3 kg moving with a velocity of 2 ms- collides head-on with another sphere of mass 4 kg moving in opposite direction with a velocity of 1 ms. After collision if they stick together and move with a velocity v, find (i) the total initial momentum and (ii) the value of velocity v.
Answer» ANSWER :`2 KGMS ^(-1);2//7 MS ^(-1)`