vocab
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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work | the results when a force causes an object to move.
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machine | a device that changes the amount of force applied to an object.
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lever | a simple machine.
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fulcrum | the fixed point on a lever.
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effort arm | the part of a lever on which a person or an other machine applies a force.
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resistance arm | the resistance or load on a lever.
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pulley | a wheel that has a groove in its edge.
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wheel and axle | a central machine that has a central pivot around which a wheel moves.
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inclined plane | a flat sloping surface.
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wedge | a simple machine composed of 1 or 2 inclined planes.
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screw | an inclined plane wrapped around a cylinder or cone.
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compound machine | a device made up of 2 or more simple machines.
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efficiency | the ratio of the workthat comes out of a machine to the work put in it.
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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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