Glossary+of+Terms

__ **Gravitational Field**- __ the curved space around mass
====__ **Inertia**- __ The tendency of an object in motion to stay in motion, and an object that is stopped to remain stationary. An object that has a greater mass has greater inertia which explains why object in free fall have the same velocity. ==== __** Vector ** - __ Something with size/magnitude and direction-ex. velocity __ **Scalar**- __ Something with nothing but size/magnitude doesn't contain direction-ex. speed __ **Circular Motion**- __ The motion of an object in a circle that is accelerating. This is also called Centripetal Force. Fc=mv2/r __ **Energy**- __ A conserved substance-like quality with the ability to cause change; it is measured in joules and is not created or destroyed __ **Friction**- __ A non-conservative force, caused by rubbing against a foreign surface. a. Static friction- frictional force existing before the object moves. b. Kinetic friction- frictional force that exists while the object is moving. __**Elastic**__- "bounce off". If you have an elastic collision the objects bounce off each other. m1v1+m2v2=m1v1+m2v2 __** Net Force- **__ is the total amount of forces combined. __**Newtons**__- is the unit we measure force in. __**Joules-**__ the unit we measure energy in. __**Grams**__- the unit we measure mass in. __**Work**__- is anything acting on a system that is considered to be an outside force. W=(delta)E
 * __ Momentum __** - the quantity of motion, measured as a product of its mass and velocity.
 * __ Impulse __** - the change in the momentum of a body, as a result of force acting upon it.
 * __ Inelastic __** - "sticks together". If you have an inelastic collision the objects stick together and move with a different velocity, and a mass of the objects combined. m1v1+v1v2=(m1+m2)v2