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Forces and Motion
Physics Contact Forces
Term | Definition |
---|---|
Acceleration | The rate at which velocity changes |
Average Speed | Speed = Distance divided by time. s=d/t |
constant acceleration | velocity changing at a constant rate |
Displacement | Straight line distance from Start to End Regardless of path. r = √[a² + b²] |
Distance | an amount of space between two things or people. Measurement of actual space or total movement. |
Electromagnetic Force | a force associated with charged particles |
Force | a push or pull exerted by one object on another |
Friction | a force that opposes the motion of one object moving past another |
gravitational force | an attractive force that acts between any two objects |
Gravity | A force of attraction between objects that is due to their masses. |
Inertia | resists a change in motion of an object |
instantaneous speed | The rate at which an object is moving at a given moment in time |
Law of Conservation of Momentum | law stating that the total momentum of a system does not change if no net force acts on the system |
linear graph | a line graph in which the data points yield a straight line |
magnetic force | A force produced when magnetic poles interact. |
Mass. | A measure of the amount of matter in an object |
Momentum | the force or speed with which something moves. The product of an object's mass and velocity. |
Newton | SI unit for force |
Newton's First Law of Motion | an object at rest tends to stay at rest |
Newton's Second Law of Motion | an object moves in the direction of the force applied F=m/a |
Newton's Third Law of Motion | For every action there is an equal and opposite reaction Action = Reaction |
nonlinear graph | a graph in which the displayed data form a curved line |
SPEED | Distance an object travels in a certain amount of time. |
terminal velocity | The greatest velocity a falling object can achieve |
Vector | a quantity that has both magnitude and direction |
VELOCITY | Speed in a direction |
Weight | A measure of the force of gravity on an object |