The aggregate ultimate momentum of the boy and girl must be 0 kgm/s (option C).
Conservation of momentum:
According to the principle of momentum conservation, momentum is only modified by the forces acting as they are outlined by Newton's equations of motion; momentum is never generated nor destroyed inside a problem domain.
What is Momentum?
A characteristic of a moving body that it possesses due to its mass and motion and is equal to the sum of its mass and speed.
Therefore, according to the momentum conservation law, it can be concluded that the aggregate end momentum of the boy and girl must be 0 kgm/s (option C).
Learn more about momentum here:
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