Impact And Collision
Impulse and Momentum
Impulse:
- Vector quantity that measures the change in momentum
- Equals the product of net force applied and time
- Measured in newton-seconds (N·s)
Elastic and Inelastic Collisions
Elastic: Kinetic energy of system conserves
Inelastic Collision*- Part of the System´s kinetic energy dissipates into different energy types (heat, sound)
Coefficient of Restitution
- Measures collision elasticity
- Ratio of velocity of post-collision objects & their pre-collision velocity
- Coefficients:0 (inelastic)<–>1(elastic)
Conservation of Momentum
- States sum of momenta from a closed system’s items stays constant.
