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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| A wedge is a sloped surface that forces materials apart. | true
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| A combination of fixed and moveable pulleys working together is called pulley system. | true
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| The efficiency of such a machine is determined by multiplying the efficiencies of each simple machine. | true
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| What is a simple machine, and what are the six types of simple machines? | A simple machine does work using only one movement. They are lever, wheel and axle, inclined plane, wedge, screw and pulley.
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| Which factors determine whether a lever is a first class, second class, or third class lever? | Where the input and output force are relative to the fulcrum.
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| what is a compound machine? | Two or more simple machines that operate together form a compound machine.
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| wedge | shovel, knife, axe
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| screw | drill, bolt, light bulb
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| lever | ramp, hill, plow
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| flagpole | pulley
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| roller skates | wheel and axle
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| crowbar | lever
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| a levers pivot point | fulcrum
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| a shaft that turns | axle
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| a wheelbarrow | second-class lever
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| how is the efficiency of a compound machine calculated? | by multiplying the efficiencies
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| how can gears change change the size and direction of a force? | Because gears of different sizes turn at different speeds.
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| EXPLAIN why a wedge that splits wood is an example of a compound machine. | Because it is two simple machines that are operating together.
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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:
myersrei4032
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