Term
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Definition
the distance traveled over a period of time
s=d/t |
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the speed of an object at any instant of time,
the speed given by the speedometer |
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| the speed of an object and its direction of motion |
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Definition
change in velocity divided by the time needed for the change to happen,
a=final velocity - begin velocity
time |
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Definition
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Term
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Definition
| a set of principles that explain the motion of objects |
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Definition
| an object will not change its motion unless an unbalanced force acts on it |
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Definition
| a force between two surfaces in contact that resists motion, always acts opposite to the direction of the motion |
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Definition
| the tendency to resist a change in motion |
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Definition
a change in motion occurs only if a net force is exerted on an object.
a=F/m |
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Term
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Definition
when one object exerts a force on a second object, the second object exerts an equal force in the opposite direction on the first object.
action-reaction |
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Term
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Definition
happens when a force causes an object to move in the same direction as the force that is applied
W=Fd |
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Term
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Definition
uses only one movement:
screwdriver, pulley, lever, wheel and axle, inclined plane, wedge and screw |
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Term
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Definition
| combination of simple machines: can opener combines lever and wedge |
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Term
| mechanical advantage (MA) |
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Definition
The amount machines make it easier to do a job:
MA=force out/force in |
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Definition
| has a groove with a rope or cable running through it, changes direction of a force |
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| a rod or plank that pivors about a fixed point called a fulcrum |
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