Impulse:

$\overline{){\mathbf{J}}{\mathbf{=}}{\mathbf{F}}{\mathbf{\xb7}}{\mathbf{t}}{\mathbf{}}{\mathbf{=}}{\mathbf{}}{\mathit{m}}{\mathbf{\xb7}}{\mathbf{\u2206}}{\mathbf{v}}{\mathbf{=}}{\mathbf{\u2206}}{\mathbf{p}}}$

The change in the momentum of a system is called impulse.

When we say that momentum is "conserved," we mean

A) The momentum of an object is the same before and after a collision.

B) The momentum of the universe increases; it never decreases.

C) The momentum of an isolated system is constant.

D) If there are no forces acting on an object, its momentum is zero.

Frequently Asked Questions

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