Question

A body of mass 5 kg moving with a velocity 10m/s collides with another body of mass 20kg at rest and comes to rest velocity of the second body due to the collision is

Answer 1

m1 ≈ 2 kg

u1 ≈ 10

v1 ≈ 1

m2 ≈ 5

u2 ≈ 0

v2 ≈ ?

according to the law

m1u1+m2u2 ≈ m1v1+m2v2

2 × 10+5 × 0 ≈ 2 × 1 + 5 × v2

20+0 ≈ 2+5v2

20 ≈  2+5v2

20-2 ≈5v2

18 ≈5v2

18/5 ≈ v2

3.6 ≈ v2

Answer 2

Answer:

mass of 1 body=5kg

velocity os 1 body= 10m/s

mass of 2 body=20kg

velocity of 2 body=?

using fourmala

velocity of 2=mass of 1*velocity of 1/mass of 2

velocity of 2=5*10/20

velocity of 2=2.5m/s