| A | B |
|---|
| force | a push or pull exerted on an object. |
| Newton | a unit of force |
| net force | overall force on an object |
| balanced forces | equal forces acting on an object in opposite directions |
| unbalanced forces | a non zero net force that changes an objects motion |
| inertia | the tendency of a moving object to continue moving at the same speed |
| mass | a measure of how much matter is in an object |
| More mass results in | greater inertia |
| friction | the force that one surface exerts on another surface |
| static friction | frictional force that tries to stop a stationary object from moving |
| sliding friction | frictional force that occurs when one object slides over another |
| rolling friction | frictional force that occurs when one object rolls over another |
| fluid friction | frictional force that occurs when one object moves through a fluid |
| air resistance | the fluid friction exerted on an object falling throught the air |
| gravity | the force that pulls two objects together |
| free fall | the mothion of an object when the only force is gravity |
| weight | measure of gravity on an object |
| weight formula | mass X 9.8m/s =mg |
| projectile | an object that is thrown |
| satellite | an object that travels around another object in space |
| centripetal force | the inward force that causes an object to move in a circle |
| momentum | a measure of the amount of motion that an object has. |
| momentum is equal to? | the objects mass times the objects velocity |
