3.3
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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| there are a total of 3 types of simple machines | false
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| the forearm of the human body works like a third-class lever | true
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| there are four types of classes of levers | false
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| which factors determine whether a lever is a first class lever, second class lever, or third class lever | the input forces, output forces and the fulcrum
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| what is a compound machine | when two or more machines work together
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| how do you calculate efficiency of a compound machine | divide
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| how can you use a wedge | door stop, axe, and eating food
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| how can you use a lever | your arm, your neck, and your foot
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| how can you use a pulley | lift an engine, open your window blinds, and an elevator
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| flagpole | pulley
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| roller skates | wheel and axle
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| sailboat mast | pulley
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| a lever pivot point | fulcrum
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| an oar | first-class lever
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| a hockey stick | third-class lever
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| how can gears change there size and direction | they go opposite directions
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| what happens to efficiency of the overall machine as more simple machines are added to it | the efficiency decreases
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
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