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# Motion Review Guide

### Physical Science

TermDefinition
Acceleration Change in velocity per unit of time
Air resistance The force that opposes the motion of objects in the atmosphere
Dependent variable Controlled by the scientist x-axis
Distance Length between any two points in the path of an object
Distance-time graph Shows relationship between distance and time
Force A push or a pull (any cause of change in motion)
Friction A force that opposes the motion of one surface past another
Gravity A force of attraction between two objects
Independent variable Stand alone y-axis
Inertia A tendency of any object to opposes a change in position
Mass The quantity of matter that a body contains as measure by the force of gravity on it
Momentum The mass times of velocity of an object
Motion A change in position relative to fix it
Newton Amount of force need to give a 1 kg mass an acceleration 1 m/s/s
Slope The steepness of the line
Speed Distance traveled per unit of time
Terminal Velocity Constant speed a falling object reaches when air resistance balances gravity
Velocity Speed in a particular direction
Weight A measurement of gravity's pull on an object
Newton's 1st Law of Motion If an object at rest, it stays at rest. If an object is in motion, it stays in motion.
Newton's 2nd Law of Motion a=f/m
Newton's 3rd Law of Motion For every action, there is an equal and opposite re-action
What causes a change in acceleration? If it has been stopped.
How does increasing the mass of an object affect Newton's 1st law of motion? It would be harder to move.
What happens to the acceleration of an object if you increase the force? It will be easy to move.
What happens to the acceleration of an object if you increase the mass? It will be more difficult to move.
Created by: pay10201997