544 B
544 B
Linear Momentum
Total momentum of system stays the same when there is no external force acting on it.
Summary
- Total momentum is vector sum
- If net external force is 0, then momentum stays the same.
- Momentum is conserved in every action
- Nonzero net external force transfers momentum in or out of system, which is impulse.
- Center of mass velocity stays constant when no external force.
Center of Mass Velocity
\vec v_{cm}=\frac{\Sigma \vec p_i}{\Sigma m_i}
Treats whole system like momentum is concentrated in one point.