unit F Ch. 2
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 | When a force causes an object to move in the direction of the applied force.
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| Machine | any device that changes the amount of force applied to an object, the direction, or both.
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| Lever | a simple machine having an arm that moves around a fixed point.
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| Fulcrum | the fixed point; pivot point
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| Effort Arm | the part of the lever on wich a person or another machine applies a force.
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| Resistance Arm | the part of a lever that applies a force on an object.
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| Pulley | a wheel that has a groove along its edge.
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| Wheel and Axle | a simple machine in wich in wich either a wheel turns and axle or an axle turns a wheel around a central pivot point.
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| Inclined Plane | any flat, sloping surface.
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| Wedge | a simple machine made up 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 that is made up of 2 or more simple machines
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| Effieciency | the ratio of the work that comes out of a machine to the work put into that machine.
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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.
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.
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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