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