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### 26 Cards in this Set

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 work Work is done on an object when a force moves the object through a distance. _________ results when a force produces a movement in the direction of the force. work ___________ is the force that is put into a simple machine. effort force What are the parts of a lever? The parts of a lever are a bar and a fulcrum. wheel and axle A wheel and axle is made up of a large wheel attached to a smaller wheel or rod. screw Wrapping an incline plane around a pole is a screw. A flat surface that has one end higher than the other is an ____________. inclined plane Two inclined planes placed back-to-back form a ________. wedge In a lever, the force that is used to move the bar is called the __________? effort force wedge Two inclined planes placed back-to-back form a wedge. A simple machine made up of a bar and a fulcrum is a ________. lever When the resulting end of a lever moves a shorter distance than the effort end, it moves with ___________? a greater force A _____ is made up of an inclined plane wrapped around a pole. screw To use a pulley to change both force and direction, you need ___________. one fixed and one movable pulley simple machines The basic machines that make up other machines. lever A bar that turns around a fixed point. When you turn a doorknob, you are using ___________? a wheel and axle fulcrum The fixed point, or one that doesn't move, around which a lever turns. inclined plane A flat surface that has one end higher than the other. The part of a lever around which the bar moves is the ________. fulcrum A wedge changes an effort force ________? down to a resulting force sideways effort force The force which causes a lever to turn around a fulcrum from pulling or pushing the lever. A large wheel connected to a smaller wheel is a _______. wheel and axle A basic device that can change the amount or the direction of force, or both at once, is a _______ simple machine To raise a heavy load, you could use a system made up of one fixed ______ and several movable ones. pulley pulley A pulley is made up of a rope or chain and a wheel around which the rope fits.