Which one of the following is an example of Second Class Lever ?
A pair of scissors
A bottle opener
A cricket bat
A bow and arrow
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC NDA-1 – 2023
– Class 2 Lever: Load is between the fulcrum and the effort (e.g., wheelbarrow, bottle opener, nutcracker). Class 2 levers always provide mechanical advantage (>1).
– Class 3 Lever: Effort is between the fulcrum and the load (e.g., fishing rod, forceps, cricket bat, tweezers). Class 3 levers always have mechanical advantage (<1), prioritizing range of motion or speed over force multiplication.
– A bottle opener uses the lip of the bottle cap as the fulcrum. The opener is used to lift the cap (load) by applying force (effort) at the end of the handle. The load (cap) is lifted between the fulcrum and the effort. Hence, it is a Class 2 lever.
– A cricket bat has the player’s hands applying effort between the pivot (often lower hand near the handle end) and the point of impact with the ball (load). Hence, it is a Class 3 lever.
– A bow and arrow is not typically classified as a simple lever system.