Question

A mass 2 Kg moving with a speed of 100 m/s collides and sticks t o a mass of 5 Kg. What is the velocity and momentum after the collision.

Answer 1

Answer:   Momentum=200 kgm/s    

                Velocity after collision =28.57m/s

Explanation:

According to the law of conservation of momentum:

momentum before collision = momentum after collision

∴Momentum after collosion =2*100=200 kgm/s

200=momentum after collision

After collision ,

the two particles stick together . Hence their total mass is 2+5=7kg

V=velocity after collision

200=7*V

∴ V=200/7=28.57 m/s