Question

two bodies of 5kg and 3kg moving with velocity 3m/s in 10m/s straight line with 3kg behind 5 kg collide. after the collision, 3kg has a velocity of 5m/s the velocity of 5kg mass is
1-10m/s
2-6m/s
3-9m/s
4-3m/s​

Answer 1

Answer:

1

Explanation:

1-10m/s

2-6m/s

3-9m/s

4-3m/s

Answer 2

Given:

Before collision

Mass of a body(m₁)=5kg

Mass of the other body(m₂)=3kg

Initial velocity possessed by a body  (u₁)=3m/s

Final velocity possessed by the other body (u₂)=10m/s

After collision

Final velocity of 3kg body (v₂)=5m/s

Final velocity of 5kg body (v₁)=?

To find the velocity of the body with a mass of 5 kg after collision

Solution:

Using the law of conservation of momentum

$m_{1} u_{1} +m_{2} u_{2} = m_{1} v_{1} +m_{2}v_{2}$

⇒5×3+3×10=5×v₁+3ₓ5

⇒15+30=5v₁+15

⇒45=5v₁+15

⇒5v₁=45-15

⇒v₁=30/5

⇒v₁=6m/s

After a collision, the bodies move in the opposite direction. Thus, the velocity of 5kg mass after a collision is -6m/s.

₁

Explanation: