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17 Cards in this Set
- Front
- Back
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Newton's first law of motion (the law of inertia)
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Every object continues in its state of rest, or of uniform motion in a straight line, unless compelled to change that state by forces impressed upon it
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Inertia
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The property of things to resist changes in motion
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Force
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In the simplest sense, a push or a pull
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Net Force
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The vector sum of forces that act on an object
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Mechanical Equilibrium
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The state of an object or system of objects for which there are no changes in motion. In accord with Newton's first law, if at rest, the state of rest persists. If moving, motion continues w/o change
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Equilibrium rule
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For any object or system of objects in equilibrium, the sum of the forces acting equals zero. In equation for EF=0
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Speed
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How fast something moves; the distance traveled per unit of time
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Velocity
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The speed of an object and a specification of its direction of motion
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Vector quantity
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Quantity in physics that has both magnitude and direction
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Acceleration
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The rate at which velocity changes with time; the change in velocity may be in magnitude, or direction, or both
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Free Fall
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Motion under the influence of gravity only
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Speed
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D/T interval
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Average speed
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total D covered/T interval
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Acceleration
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change of V/T interval
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Acceleration (along a straight line)
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change in S/T interval
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Velocity acquired in free fall from rest
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V = gt
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Distance fallen in free fall, from rest
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D=(1/2)gt^2
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