Question

Explain the difference between second class and third class lever.

Answer 1

Second Class Lever

In this, the fulcrum is at one end and the force applied is on the other end. The weight is situated in the middle of these two. The order of this would be fulcrum-weight-force. The application of force at one end will result in some work done on the other end.

Example:

• Wheelbarrow
• Staplers
• Doors or gates
• Bottle openers
• Nutcracker
• Nail clippers

Third Class Lever

These are the levers in which the fulcrum is at one end and the force is applied in the middle and the weight is on the other end. The order is represented as a weight-force-fulcrum. In this case, we have to apply more energy to displace the weight to a longer distance.

Example:

• Fishing rod
• A broom
• A baseball bat
• A bow and arrow
• Human jaw