Unit 8
Momentum.
Mass times velocity: impulse, the total no collision can change, and where the energy goes when carts collide.
Before this unit
The unit, lesson by lesson
Lessons
4 lessons · 24 practice questions · about 2 hours
Mass times velocity
What momentum is: mass times velocity, its unit, a heavy slow cart against a light fast one, and why momentum has a direction.
Impulse
How a force changes momentum: impulse, force times time, the equal and opposite pushes of two colliding carts, why a bounce pushes harder than a stick, and why an airbag protects.
Conservation of momentum
The total no collision can change: the total momentum before and after, carts that stick, momentum handed over, a cart that bounces back, and carts heading towards each other.
Elastic and inelastic collisions
What happens to kinetic energy in a collision: elastic, inelastic and perfectly inelastic collisions, how much energy is lost, finding the bounciness from the velocities, and where the energy goes.