In a spring balance, which part is stretched when a force is applied?

Correct option is D

The correct answer is (d) Coiled spring.
· In a spring balance, the coiled spring is the part that gets stretched when a force (such as weight) is applied.
· The stretching of the spring is proportional to the force applied, following Hooke's Law, which states that the extension of the spring is directly proportional to the force applied within its elastic limit.
Information Booster:
· The other options, such as nylon band, rubber band, and elastic thread, are not typically used in spring balances for measuring force.