Energy cannot be created or destroyed- it can only be transferred into different forms
Conservation of momentum
The total momentum of a system before an event must be equal to the total momentum of the system after the event. assuming no external forces act.
Elastic collision
A collision in which the total kinetic energy of a system before the collision is equal to the total kinetic energy after the collision.
Inelastic collision
A collision in which the total kinetic energy of the system before the collision is equal is not equal to the kinetic energy of the system after the collision.
Impulse
The change of momentum of an object when a force acts on it. It is equal to the product of the force acting on the object and the length of time over which it acts.
Inertia
Resistance of an object to a change in it‘s motion
Scaler
A scaler quantity is one that only has a magnitude e.g. length, mass and temperature
Vector
A vector quantity is one that has both a magnitude and a direction e.g. velocity, displacement and acceleration.
