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The change in position in a certain amount of time.
Motion
How much time it takes to travel a distance.
Speed
Speed and direction. It changes when speed changes, when direction changes, or both.
Velocity
A force that acts at a distance and pulls objects towards each other.
Gravity
The amount of matter in an object.
Mass
The force that resists the motion of an object. It slows things down.
Friction
The measurement of the movement of matter. The relationship between an objects mass and velocity.
Momentum
A push or pull on an object. It makes an object move, stop, change directions, speed up or slow down.
Force
Two or more opposite forces that cancel each other out.
Balanced Forces
When two or more forces cause a chane in motion, speed, and or direction.
Unbalanced Forces
The final force and its direction.
Resultant
A line with an arrow and a dot which can show a force.
Vector
Unit used to measure force.
Newtons
A car is moving at a constant speed. What is the speed of the car if it moves 50 miles in 2 hours?
25 m/hr
What two things affect the pull of gravity
Mass and Distance
A train is moving at 55 m/hr south. What is its velocity?
55 m/hr south
