Fill in the blanks 3. the work done on a machine
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The useful work done by an actual machine is always **less** than the work done on the machine.
In class II levers, the load is in between fulcrum and **effort**.
The mechanical advantage of class **III** lever is always less than 1.
A pulley is used to change the **direction of effort**.
The mechanical advantage of an inclined plane is always **greater than 1*
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