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dusya [7]
4 years ago
10

An ice-skater is moving at a constant velocity across an icy pond, The skater throws a snowball directly ahead.

Physics
1 answer:
Murljashka [212]4 years ago
6 0

Answer:

(D) It is equal to the original velocity of the skater.

Explanation:

The velocity of the center of mass of a system is

\vec{v}_{cm} = \frac{m1\vec{v}_1 + m_2\vec{v}_2}{m_1 + m_2}

The velocity of the center of mass is constant if there is no external force, because the total momentum of the whole system is conserved.

So, before the snowball is thrown, the velocity of the center of mass is equal to that of the skater. This velocity will always be equal to the velocity of the center of mass of the system.

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