Interactive Textbook Ch. 8 Work and Machines | PDF - Free Printable

Educational worksheet: Interactive Textbook Ch. 8 Work and Machines | PDF. Download and print for classroom or home learning activities.

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- A machine is a device that makes work easier by changing the size or direction of the force you apply.
- Machines make work easier by reducing the amount of force needed to move an object, often by increasing the distance over which the force is applied.
- Mechanical advantage is the factor by which a machine multiplies the force put into it; it is calculated as output force divided by input force.
- Mechanical efficiency is the ratio of useful work output to total work input, expressed as a percentage, and accounts for energy lost to friction and other factors.

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