MECHANICAL ADVANTAGE AND EFFICIENCY

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8 Terms

1
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The ratio of the resistance force to the effort force.

Actual mechanical advantage.

2
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The ratio of work output to work input or the ratio of AMA to IMA.

Efficiency.

3
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The number of times the effort force could theoretically be multiplied, neglecting friction.

Ideal mechanical advantage.

4
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When the IMA is compared to AMA in the real world, _____.

the value of the IMA is always larger than the AMA

5
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If measuring experimental results, what can you predict about the work output of a 1200 Watt hair dryer?

The work output of the hairdryer will be less than the work input.

6
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What is the unit for IMA?

IMA is unit less.

7
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If the IMA of a machine is 3 and the effort force is 6 newtons, then the resistance force is _____.

18 newtons.

8
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A crowbar is used as a lever. The effort force of 40 newtons moves 3 meters. The resistance force of 54 newtons moves 2 meters. What is the efficiency of the lever?

90%