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18 Cards in this Set
- Front
- Back
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screw*
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Def: inclined plane wrapped around a pole
*Info: is a spiral ramp |
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pulley
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rope or chain and the wheel it fits around
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wheel & axle
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a large wheel attached to a smaller wheel or rod
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inclined plane
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flat surface that has one end higher than the other
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wedge
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two inclined planes placed back to back
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lever
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a bar that turns around a fixed point
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effort force
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force you put into a simple machine
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simple machines
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basic machines that make up other machines
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work** (know this one)
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result of a force moving an object through distance
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fulcrum** (know this one)
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fixed point of a lever
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efficiency
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how well a machine changes force to work
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torque
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a twisting or turning as a result of a push or pull
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Class I lever
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has the fulcrum between the effort and the load
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Why is pulley like a Class I lever?
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because it changes the direction of the effort force
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What does a wheel & axle do?
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increases effort force
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What does a wedge do?
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pushes objects apart
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What do Simple Machines do?
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change size or duration of the force
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Give an example of a Class I lever.
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A pulley is like a Class I lever because it changes the direction of the effort force.
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