Force & Motion

Term Definition
Acceleration equals the changes in velocity divided by the time for the change to take place
Momentum a measure of how difficult it is to stop a moving object
Speed equals the distance traveled divided by the time it takes to travel that distance
Velocity speed and direction of a moving object
Newton First Law of Motion states that if the net force acted on an object is zero the object will remain at rest or move in straight line with a constant speed
Newton Second Law of Motion states that an object acted upon by net force will accelerate in the direction of the force
Newton Third Law of Motion states that force always act in equal but opposite pairs
balanced force two or more forces whose effects cancel each other out and do not change the motion of a object
friction force that acts to oppose sliding between two surfaces that are touching
unbalanced force two or more forces acting on an object that do not cancel and cause the object to acclerate

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