# Balls weighing 5 kg and 6 kg move parallel to each other in the same direction at speeds of 4 m / m and 6 m / s,

September 30, 2021 | education

| **Balls weighing 5 kg and 6 kg move parallel to each other in the same direction at speeds of 4 m / m and 6 m / s, respectively. What is the total momentum of these two balls?**

Given:

m1 = 5 kilograms – the mass of the first body;

m2 = 6 kilograms – the mass of the second body;

v1 = 4 m / s – speed of the first ball;

v2 = 6 m / s – the speed of the second ball.

It is required to determine the total impulse of the balls P (kg * m / s).

The momentum of the first ball is:

P1 = m1 * v1 = 5 * 4 = 20 kg * m / s.

The momentum of the second ball is:

P2 = m2 * v2 = 6 * 6 = 36 kg * m / s.

Since the bodies move in parallel and in the same direction, then:

P = P1 + P2 = 20 + 36 = 56 kg * m / s.

Answer: the total impulse of the two balls is 36 kg * m / s.

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