Question

Two rods, one made of copper and the other of steel, have the same dimensions. If the copper rod stretches by 0.15 mm under some stress, how much does the steel rod stretch under the same stress?

Answer 1

The steel rod would also stretch by 0.15 mm under the same stress.

Step-by-step explanation:

When a rod is subjected to stress, it undergoes a change in length known as elongation. The elongation of a rod is directly proportional to its length and the stress applied. In this case, we are given that the copper rod stretches by 0.15 mm under some stress.

To find the elongation of the steel rod under the same stress, we can use the concept of Young's modulus. Young's modulus relates the stress applied to a material with the resulting strain or elongation. Since both rods have the same dimensions and are under the same stress, we can assume that they have the same Young's modulus.

Therefore, the elongation of the steel rod under the same stress would also be 0.15 mm.