Question

A lever mechanism has Effort (E), Fulcrum (F) and Load (L). For example, a pair of scissors will have an order ‘EFL’ as shown in the image below. Similarly, choose the correct order for a Tweezer and a Nutcracker.

• A. Tweezer = EFL, Nutcracker = FEL
• B. Tweezer = FEL, Nutcracker = ELF
• C. Tweezer = FLE, Nutcracker = FEL
• D. Tweezer = LFE, Nutcracker = LFE

Hint:

In lever systems, remember that the position of the effort, fulcrum, and load determine the class of the lever. For Tweezer and Nutcracker, the fulcrum is in the middle, making them Class 1 levers.

Answer 1

The Correct Option is B

Step 1: Understanding the mechanics of lever systems.
The lever mechanism consists of three parts: Effort (E), Fulcrum (F), and Load (L). The order of these components determines the class of the lever. In scissors, the effort is applied on the handles, the fulcrum is the pivot, and the load is the object being cut.
Step 2: Analyzing the options for Tweezer and Nutcracker.
(A) Tweezer = EFL, Nutcracker = FEL: This is incorrect as the load and fulcrum positions are swapped.
(B) Tweezer = FEL, Nutcracker = ELF: This is correct. A Tweezer works with the fulcrum in the middle, with effort and load at opposite ends. A Nutcracker uses a similar arrangement with effort at the ends and the fulcrum at the center.
(C) Tweezer = FLE, Nutcracker = FEL: This is incorrect. The positions of load and effort do not match the mechanism of a Tweezer and Nutcracker.
(D) Tweezer = LFE, Nutcracker = LFE: This is incorrect because the order of the load and effort is wrong.
Step 3: Conclusion.
The correct answer is (B) because it correctly represents the order for Tweezer and Nutcracker.