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Mechanical Advantage

Mechanical Advantage. Mechanical Advantage . If you compare the input force to the output force, you can find the advantage of using a machine. A machine’s mechanical advantage is the number of times a machine increases a force exerted on it.

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Mechanical Advantage

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  1. Mechanical Advantage

  2. Mechanical Advantage • If you compare the input force to the output force, you can find the advantage of using a machine. • A machine’s mechanical advantage is the number of times a machine increases a force exerted on it. • Finding the ratio of output force to input force gives you the mechanical advantage of a machine.

  3. Increasing Force • When the output force is greater than the input force, the mechanical advantage of a machine is greater than 1.

  4. Mechanical advantage can also be calculated by dividing the input distance by the output distance. ID MA = OD

  5. Increasing Distance • For a machine that increases distance, the output force is less than the input force. • So in this case, the mechanical advantage is less than 1. • For example, suppose your input force is 20 newtons and the machine’s output force is 10 newtons. • The mechanical advantage is • The output force of the machine is half your input force, but the machine exerts that force over a longer distance.

  6. Changing Direction • What can you predict about the mechanical advantage of a machine that changes the direction of the force? • If only the direction changes, the input force will be the same as the output force. • The mechanical advantage will always be 1.

  7. Practice Problems Estimate the MA of this machine? fulcrum Estimate the output force of this machine?

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