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Stack #4724394

QuestionAnswer
Reference point The starting point you choose to describe the location, or position, of an object.
position An object's distance and direction from a reference point.
displacement The difference between the initial, or starting, position and the final position.
distance The total length of the path traveled by an object.
speed A measure of the distance an object travels in a given amount of time.
motion The process of changing position.
Reference point guidelines
1.Any stationary object (ground, building) can serve as a reference point
2. The reference point should remain fixed (not moving) during observation
3. Pick something obvious and easy to identify
starting line for a race, home plate for baseball
4. Motion is relative to the reference point chosen
Velocity has speed and direction
acceleration A measure of the change in velocity (Speed and direction) during a period of time.
force A push or pull on an object.
friction A contact force that resists the sliding motion of two objects sliding that are touching.
Newton’s 1st law of motion - an object in motion will stay in motion until acted upon by an outside force
Balanced forces have _______ forces in opposite directions and produce no change in motion equal
Unbalanced forces have ________ forces in opposite directions and cause a change in motion unequal
collision an event where two or more objects bump or crash into each other, exerting forces on one another that change their motion and transfer energy
Newton's Third Law principle states that for every action force, there is an equal and opposite reaction force.
impact The forceful striking or collision of one object against another.
proportional A relationship between two quantities where they change at the same rate; if one doubles, the other doubles.
When the mass on one or both object(s) increases, the gravitational force between them also increases. This is a ______ relationship. proportional
When the distance between two objects______the gravitational force between them decreases. Increases
Created by: im him 67
 

 



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