Question

Two bodies of masses 5 kg, 20 kg moving with velocity 4ms-1 collide another body at rest what is final velocity of two bodies​

I will mark as branlist answer

Answer 1

Answer:

$\frac{4}{5} m/s$

Explanation:

We can say that:

M₁u₁+M₂u₂=M₁v₁+M₂v₂

Where:

M₁= Mass of first body = 5 kg

M₂= Mass of second body = 20 kg

u₁= Initial velocity of first body = 4 m/s

u₂=Initial velocity of second body = 0 m/s

v₁=Final velocity of first body = v₂=Final velocity of second body (As after they collide they will move with same velocities as nothing is mentioned in the question)

Substituting the values, we get:

5×4+20×0=5×v₁+20×v₂

As v₁ and v₂ are equal,

20=5v+20v

20=25v

v= $\frac{20}{25}$

v= $\frac{4}{5} m/s$

The final velocity of both the bodies will be equal to $\frac{4}{5} m/s$