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11 Cards in this Set
- Front
- Back
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Speed
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The rate at which an object moves. (distance /time)
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Average speed
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the average distance traveled (total distance/total time)
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Constant speed
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steady unchanging speed.
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Velocity
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distance traveled per unit time (distance/time)
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Acceleration
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The rate at which an object's velocity changes with time. (final velocity – original velocity /time)
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Frame of reference
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background or object that is used for comparison
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Momentum
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The product of an objects mass and velocity (mass*velocity)
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Force
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a push or pull exerted on an object (mass*acceleration)
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Friction & 3 types
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A force that one surface exerts on another when the two rub against each other. The three types are fluid, rolling, sliding.
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Mechanical advantage
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The number of times a force is exerted on a machine is multiplied by the machine.
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6 types of simple machines and examples of each
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inclined plane (ramp) wedge (zipper) , the screw (jar lids), the lever (crow bar), the wheel and axle (doorknob), and the pulley (flagpole rope)
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