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HVJ PS Motion/Forces

Talbert Force, motion terms

QuestionAnswer
Instantaneous speed A cop radar guns your car and it registers the speed you are going at that time
Velocity This describes the speed and direction of a moving object
Speed Distance / Time
Distance A measure of how far an object travels
Displacement The distance and direction an object travels
Acceleration A change in speed or direction
Positive Acceleration Speed increases
Negative Acceleration Speed decreases; deceleration
Formula for Acceleration (final velocity - initial velocity) / time
Force A push or pull - occurs in pairs
Net Force Two or more forces acting on an object at the same time and combine to form this
Balanced Forces Forces on an object equal in size and opposite in direction
Unbalanced Forces This can cause the motion of an object to change
Newton's First Law of Motion States that an object at rest will stay at rest and an object in motion will stay in motion until acted on by an unbalanced force
Inertia The tendency of an object to resist motion
Newton's Second Law of Motion This states that force causes an object to accelerate in the direction of the force; F = M x A
Friction A force that opposes the sliding motion of two surfaces touching each other
Gravity Attractive force between two objects; Equal to 9.8 m/sec/sec
Weight Changes going into space; W = M x G
Newton's Third Law of Motion For every action force, there is an equal and opposite reaction force
Created by: rosetalbert
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