Intro to Conservation of Momentum Video Lessons

Concept

# Problem: Which statement must be true for the momentum of a system to be conserved?a. The net external force on the system is non-zero.b. There are no external forces acting on the system.c. The internal forces sum to zero.d. The net external force on the system is zero.

###### FREE Expert Solution

Force and momentum are related by the equation:

$\overline{){\mathbf{F}}{\mathbf{=}}\frac{\mathbf{d}\mathbf{p}}{\mathbf{d}\mathbf{t}}}$

When the momentum is conserved, the change in momentum, dp = 0.

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###### Problem Details

Which statement must be true for the momentum of a system to be conserved?
a. The net external force on the system is non-zero.
b. There are no external forces acting on the system.
c. The internal forces sum to zero.
d. The net external force on the system is zero.

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