MECHANICAL ADVANTAGE AND EFFICIENCY
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8 Terms
The ratio of the resistance force to the effort force.
Actual mechanical advantage.
The ratio of work output to work input or the ratio of AMA to IMA.
Efficiency.
The number of times the effort force could theoretically be multiplied, neglecting friction.
Ideal mechanical advantage.
When the IMA is compared to AMA in the real world, _____.
the value of the IMA is always larger than the AMA
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.
What is the unit for IMA?
IMA is unit less.
If the IMA of a machine is 3 and the effort force is 6 newtons, then the resistance force is _____.
18 newtons.
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%