Question

Explain what distinguishes first class levers from second and third class levers.

Answer 1

Answer:

In a first class lever, the fulcrum is located between the load and the effort. A seesaw is a class one lever.

Second-class levers have the load between the effort and the fulcrum. A wheelbarrow is a second-class lever.

Third-class levers have the effort placed between the load and the fulcrum. Scissors are a third-class lever.

Answer 2

Levers are classified into first, second and third class categories based on the different positions of the load, effort and fulcrum.

First class levers :

• The fulcrum is located inbetween the Effort and the load such as in scissors

Second class levers :

• The load is inbetween the fulcrum and effort such as in Wheel barrow.

Third class levers :

• The Effort is inbetween the load and Fulcrum such as in Spade.

Therefore, different classes of levers are based on the position of the fulcrum, load and effort

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