# The momentum of a ball rolling on a horizontal plane is 6 kg * m / s. Determine the speed

The momentum of a ball rolling on a horizontal plane is 6 kg * m / s. Determine the speed of the ball if its mass is 200 g.

P = 6 kg * m / s.

m = 200 g = 0.2 kg.

V -?

The momentum of the body P is called a vector physical quantity equal to the product of the mass of the body m by the speed of its movement V: P = m * V. The momentum of the body is directed in the same way as the speed of movement of the body.

Let us express their formulas for the speed of movement: V = P / m.

V = 6 kg * m / s / 0.2 kg = 30 m / s.

Answer: the ball moves along a horizontal plane with a speed of V = 30 m / s.

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