Question

A ball of mass 0.2 kg moving with a velocity of 6m/s^-1 collides directly with a ball of mass 0.4 kg at rest. Calculate their common velocity if both balls move together.

Answer 1

Answer:

Here is your answer

Explanation:

Given

Mass of the Object 1 = 0.2 kg

Mass of the Object 2 = 0.4 kg

Initial Velocity of Object 1 = 6 m/s

Final Velocity of Object 2 = ?

Initial velocity of Object 2 = 0 m/s

Final Velocity of Object 2 = ?

Solution

According to the law of Conservation of Momentum

(Mass of Object 1 x Initial Velocity of Object 1) + (Mass of object 2 x Initial velocity of object 2) = (Mass of the object 1 x Final velocity) + (Mass of the object 2 x Final velocity of object 2)

m1u1 + m2u2 = m1v1 + m2v2

1.2 + 0 = (0.2 + 0.4)v2

1.2 = (0.6)v2

1.2/0.6 = v2

2 m/s = v2

Hence the velocity of two object together is 2 m/s