Birkofer Ch. 18 Work and Machines
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| What is Work? | is when a force causes and object to move in the direction of the force.
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| What is joule? | Joule is the unit used to express work.
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| What is a watt? | The unit used to express power.
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| What is power? | Power is the rate at which work is done.
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| Define Machine | A machine is a device that helps make work easier by changing the size or direction of a force.
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| Work input | the work you do on a machine.
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| Work output | the work done by the machine
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| lever | a simple machine consisting of a bar that pivots on a fixed point ( fulcrum ).
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| inclined plane | a simple machine that is a straight slated surface.
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| wedge | is a double sided inclined plane that moves
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| pulley | is a simple machine consisting of a grooved wheel that holds a rope or a cable
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| compound machine | made of two or more simple machines
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| mechanical efficiency | is a comparison of a machine's work output with the work input
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| mechanical advantage | tells you how many times the machine multiplies force
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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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