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PSQ3W1PHYS

MOTION

QuestionAnswer
Acceleration rate at which velocity changes.
Average Speed total distance traveled divided by the time required to make the trip.
Free Fall downward movement of a body under only the force of gravity; during true free fall, the influence of air resistance is ignored; satellites in space can encounter absolute free fall.
Instantaneous Speed speed at any given instant; her instantaneous speed was 45 miles per hour at one moment and 50 miles per hour a few minutes later.
Motion continuously changing position relative to a reference point. Ex. if you and your friend run together at the same speed, you have no motion relative to each other.
Speed an expression of the rate at which a given distance is covered; measured in distance divided by time, or meters/second. Her speed is 10 meters/second.
Velocity the speed of an object IN A GIVEN DIRECTION. His velocity is 10 meters/second north. An object can change velocity (direction) without changing speed.
Reference point point to which other points, lines, and so forth are referred, usually in terms of distance or direction, or both.
Created by: Ruth.Miller
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