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17 Cards in this Set
- Front
- Back
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the ability to do work
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energy
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the ability to make something move
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mechanical energy
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a fixed unmoving object or location
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reference point
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the change in an object's position
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motion
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the amount of matter in an object
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mass
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the resistance to a change in motion
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inertia
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a push or pull that causes an object to change speed or direction
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force
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determined by an object's mass and velocity
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momentum
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keeps an object from moving against other objects
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friction
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occurs whenever an object speeds up, slows down, or changes direction
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acceleration
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unit that measures work
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joule
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a decrease in effort that is needed to move an object
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mechanical advantage
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a machine that is a bar that turns on a point
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lever
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a machine is actually an inclined plane wound around a cylinder or cone
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screw
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a machine consist of two inclined planes placed back to back
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wedge
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a simple machine that makes work easier by either changing the direction of the force or by reducing the amount of force needed to move an object
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pulley
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Who came up with the laws of motion
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Sir Isaac Newton
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