Question

What are the different orders of levers? Give examples in each case. Mention the advantages of using a pulley.​

Answer 1

Answer:

First class lever – the fulcrum is in the middle of the effort and the load.

Second class lever – the load is in the middle between the fulcrum and the effort.

Third class lever – the effort is in the middle between the fulcrum and the load

• In a Class Three Lever, the Force is between the Load and the Fulcrum. If the Force is closer to the Load, it would be easier to lift and a mechanical advantage. Examples are shovels, fishing rods, human arms and legs, tweezers, and ice tongs. A fishing rod is an example of a Class Three Lever.

• The main advantage in the use of pulleys is that the effort becomes less as compared to the normal lifting of the weights. In other words, it reduces the amount of actual force required to lift heavy objects. It also changes the direction of the force applied.