Elastic and inelastic collisions  Momentum
Elastic and inelastic collisions
Lessons
Notes:
In this lesson, we will learn:
 Meaning of elastic and inelastic collisions
 What happens to kinetic energy in a collision?
 Understanding perfectly inelastic collisions
 Problem solving with elastic and inelastic collisions
Notes:
 Total momentum and total energy are conserved in collisions. However, kinetic energy is not always conserved, since it can be converted into other forms of energy.
 Elastic collision: collision where no kinetic energy is lost
 Inelastic collision: collision where part of the kinetic energy is converted to other forms of energy
 Perfectly inelastic collision: collision where the maximum possible amount of kinetic energy is converted to other forms of energy; objects stick together.
Conservation of Momentum
$\sum\vec{p}_i = \sum\vec{p}_f$
$\vec{p}_i:$ initial momentum, in kilogram meters per second (kg·m/s)
$\vec{p}_f:$ final momentum, in kilogram meters per second (kg·m/s)
Conservation of Energy
$\sum\vec{E}_i = \sum\vec{E}_f$
$\vec{E}_i:$ initial energy, in joules (J)
$\vec{E}_f:$ final energy, in joules (J)
Kinetic Energy
$KE = \frac{1}{2}mv^2$
$KE:$ kinetic energy, in joules (J)
$m:$ mass, in kilograms (kg)
$v:$ speed, in meters per second (m/s)
Potential Energy
$PE = mgh$
$PE:$ potential energy, in joules (J)
$g:$ acceleration due to gravity, in meters per second squared (m/s^{2})
$h:$ height, in meters (m)

Intro Lesson
Introduction to elastic and inelastic collisions

1.
Solving word problems with momentum and elastic/inelastic collisions

2.
$\bold{\sum\vec{E}_i = \sum\vec{E}_f}$ $\bold{ ; }$ $\bold{\sum\vec{p}_i = \sum\vec{p}_f:}$ Conservation of energy and momentum in elastic and inelastic collisions