Question

Answer the following questions:
(a) What is a lever? How many types of levers are there?​

Answer 1

Answer:

The beam rests on a fulcrum (a point on the bar creating a pivot). When you push down one end of a lever, you apply a force (input) to it. The lever pivots on the fulcrum, and produces an output (lift a load) by exerting an output force on the load.

There are three kinds of lever-

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pair of scissors or boat oars, toilet handle, and seesaw. Class 2 levers include wheelbarrows, bottle openers, nail clippers, and crowbars. Some common types of Class 3 levers are fishing poles, mousetraps, and tongs.