Define a lever.

Define mechanical advantage of a lever.

Which of these machines are levers of second order? Crowbar, tongs, wheel barrow, nutcrackers, lever balance

Two bodies of the same volume but of different masses are in equilibrium on a lever. Will the equilibrium be violated if the lever is immersed in water so that the bodies are completely submerged?

The following figure shows the use of a lever. (i) Give an example of this class of lever and (ii) if FA= 10 cm, AB= 510 cm, calculate the minimum effort required to lift the load.

Define fulcrum, load arm and effort arm of a lever.

To use a machine as a force multiplier what class of lever should be preferred? Draw a sketch of such a lever.

Do levers always act alone, or do they act with other machines? Give an example of a lever working with another simple machine.

If the mechanical advantage of a lever is equal to 1, then the effort applied on it ______ the load.