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

Define a lever.

If load is between the fulcrum and effort of a lever, it is called ____ order lever.

Answer true or false. The fulcrum lies between load and effort in a first class lever.

Find the ratio of the load arm to that of the effort arm of a second-order lever if its mechanical advantage is 5.

The load arm and effort arm of a lever are 10 cm and 50 cm, respetively. The load and effort are applied on the opposite sides of the fulcrum. Identify the class of the lever. Find its mechanical advantage. If the effort applied is 10 N, how much load can be raised by it?

The figure shows a human foot. Mark the positions of load, effort and fulcrum in the foot. Name the type of lever foot.

Where can the fulcrum of a lever not be ?