Question

A. Body. Of. Mass. . 2kg is. travelling. with. a. uniform. velocity. of. 10m/s. what. is. it. momentum. this. body. collits. with. another. body. with. equal. mass. travelling with same. direction. with velocity 5m/s. what is the total. momentum. of. two bodies before collision. after. collision .

Answer 1

Momentum = mass × Velocity

Momentum of the body is :

2 × 10 = 20

20Kgms⁻¹
Momentum of the body that collides with it :

2 × 5 = 10

10Kgms⁻¹

Total momentum before collision = 10 + 20 = 30

= 30Kgms⁻¹

By law of conservation of momentum :

Initial momentum = final momentum.

The final momentum is thus 30Kgms⁻¹