Physics
Which type of lever has a mechanical advantage always more than 1? Give reason with one example. What change can be made in this lever to increase its mechanical advantage?
Machines
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Answer
The Class II levers have mechanical advantage always greater than 1 and the reason for this is that, the load and effort are on same side of the fulcrum but in opposite directions and the effort arm is always greater than the load arm.
Therefore, mechanical advantage is always greater than 1.
This type of levers act as a force multiplier so less effort is needed to overcome a large load.
Example — a nut cracker
In order to increase the mechanical advantage, we can increase the length of effort arm.
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