Question

Which of the following is a first order lever?

• A. Steel yard
• B. Nut cracker
• C. Tongs
• D. Wheel barrow

Answer 1

The correct option is A Steel yard

$\text{Solution}:$

1. The steelyard comprises a balance beam which is suspended from a Lever/pivot or fulcrum which is very close to one end of the beam.

2. The two parts of the beam which flank the pivot are the arms.

3. The arm from which the object to be weighed (the load) is hung is short and is located close to the pivot point. The other arm is longer, is graduated and incorporates a counterweight which can be moved along the arm until the two arms are balanced about the pivot, at which time the weight of the load is indicated by the position of the counterweight.

$\text{Hence A is the correct option}$