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Q126
(NDA-I/2023)
Science & Technology › Basic Science (Physics, Chemistry, Biology)
Official Key
Which one of the following is an example of Second Class Lever ?
Explanation
A lever is a simple machine classified into three types based on the relative positions of the fulcrum (pivot), load (resistance), and effort (force applied).
- Second Class Lever: In this type, the load is positioned between the fulcrum and the effort. A bottle opener is a classic example because the fulcrum rests on the top of the cap, the effort is applied at the handle end, and the load (the resistance of the cap) is located in the middle.
- Other Options:
- Scissors: These are First Class Levers where the fulcrum is in the middle.
- Cricket Bat: This is a Third Class Lever because the effort is applied between the fulcrum (the handle/shoulder) and the load (the ball).
- Bow and Arrow: This acts as a Third Class Lever as the effort is applied to the middle of the string.
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