Revision of defintions
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| A lever is | is a simple machine that uses a fulcrum to create movement
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| A wedge is | 2 inclined planes
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| A pulley is | a rope and circular plane
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| An axle is | a pole which enables a wheel to turn
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| A wheel is | a circular plane
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| An inclined plane is | a surface on a horizontal angle
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| A screw is | an inclined plane wrapped around a pole
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| The fulcrum is | the point where a lever changes force
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| The effort is | the force used to cause movement
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| The load is | what is being moved
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| A first class lever has | the fulcrum in the middle of the load and effort
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| A second class lever has | the load is in the middle of the fulcrum and effort
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| A third class lever has | the effort is in the middle of the load and fulcrum
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| Mechanical advantage is when | you divide the load by the effort
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| Force multipliers | multiply your effort making it easier to move a heavy load with less effort
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| speed multipliers are | third class levers which move small amounts quickly ie tennis racquet
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| A wedge is used to | split 2 objects or stop movement
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| A screw is used to | hold things together
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| A ramp is used to | move objects with less effort to a higher location
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| A pulley is used to | lift heavy loads by changing direction of the effort
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| The more pulleys you have | the easier it is to lift heavy weights
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| A wheelbarrow is | a second class lever
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| A see saw is | a first class lever
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| Tweezers are | a third class lever
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| The six simple machines are | lever, screw, inclined plane, wheel & axle, pulley and wedge.
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| A complex machine is | made up of 2 or more simple machines working together
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Created by:
nicolenixon
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