Question #6426077Single Choice

Physics

Question

Two identical balls collide elastically in outer space, where no external forces are present. Ball A moves toward ball B, which is stationary. After the collision, both balls move at equal and opposite velocities. How is this possible if total momentum is conserved?

Options

Momentum conservation allows this because the system's initial momentum was zero.

This is a special case of elastic collisions between identical objects.

The velocities of the balls after the collision must be the same as before.

This violates the law of momentum conservation

Answer & Analysis

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