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31 Cards in this Set
- Front
- Back
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effort
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the force that cause an object to move
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friction
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the force that resists the movement of objects against each other
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gravity
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the force that pulls objects toward the earth
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load
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the weight of the object being moved
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machine
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an object that makes work easier
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motion
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a change in position
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force
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a _______ is a push or pull.
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unbalanced
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something moves when the forcesacting on it become_________
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a greater/ more
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it takes________force to move a heavier object than it does to move a lighter object
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position
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using more force on an object increases the object's change in _______
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lever
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a_______is a bar that turns on a point.
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fulcrum
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the point that the lever turns on is called the________.
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distance
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the amount of effort needed on a lever is a determined by the _______between effort and the fulcrum.
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when a force moves a object over a distance
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when work is done?
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the amount of force used & the distance that the object moved
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what determines the amount of work that it is done?
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hammer,broom,scissors & fishing pole
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name four levers
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lever
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a bar that turns on a point.
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inclined plane
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a flat, sloped surface
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pulley
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a wheel with a groove that can hold a rope.
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screw
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an inclined plane wound around an axle
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wedge
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one or more inclined planes used to force things apart
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wheele & axle
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a wheel with a rod running through it
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gears
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wheel & axles with "teeth" that work together are called _______
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force
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when you turn the wheel of a wheel & axle, the axle turns with more ______ than the wheel does.
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when you turn the axle of a wheel and axel, the wheel travels a greater ________ than the axle does.
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distance
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both fixed and movable pulleys are used in a ____________
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block & tackle
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a block & tackle allows you to use _____ force when lifting an object because the rope moves a greater distance
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less
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An inclined plane lets you use less force to move an object because the load moves a greater _____.
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distance
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The inclined plane part of a screw is called the _____.
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thread
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A ______ uses the pointed part of one or more inclined planes to force things apart.
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wedge
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Where are the effort and load placed when using a pulley?
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At opposite ends of the rope that is wrapped around the pulley.
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