If $4 \mathrm {~J}$ Of Work Are Needed to Stretch a Spring From

question 57

Multiple Choice

If $4 \mathrm {~J}$ of work are needed to stretch a spring from $10 \mathrm {~cm}$ to $12 \mathrm {~cm}$ and another $20 \mathrm {~J}$ are needed to stretch it from $12 \mathrm {~cm}$ to $14 \mathrm {~cm}$ , what is the natural length of the spring? Round the answer to nearest integer.

• A) \(12 \mathrm {~cm}\)
• B) \(8 \mathrm {~cm}\)
• C) \(13 \mathrm {~cm}\)
• D) \(11 \mathrm {~cm}\)
• E) \(10 \mathrm {~cm}\)

---

Definitions:

Theoretical Size

The ideal, nominal size of a part or feature as defined in drawings, before tolerances are applied.

Limits

In engineering and manufacturing, limits refer to the maximum and minimum dimensions a part can have to be considered acceptable.

Allowance

The intentional difference in dimensions between mating parts to ensure a proper fit.

Basic Hole System

A hole basis system of fits in manufacturing where the hole is the component with the basic size, and the shafts are adjusted for different fits.