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Chapter Nine: Simple Machines
9.1 Types of Simple Machines
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9.1 Using Machines A machine is a device with moving parts that work together to accomplish a task. A bicycle is a good example.
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9.1 Using Machines The input includes everything you do to make the machine accomplish a task, like pushing on the bicycle pedals. The output is what the machine does for you, like going fast or climbing a steep hill.
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Examples of Simple Machines
A simple machine is an unpowered mechanical device, such as a lever.
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9.1 Review of energy A rope and pulley machine illustrates a rule that is true for all processes that transform energy. The total energy or work output can never be greater than the total energy or work input.
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9.2 Mechanical advantage Mechanical advantage is the ratio of output force to input force. Machines multiply force.
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