Question

Answer the following.

What is the stress in a wire which is 50m long and 0.01 cm² in cross-section, if the wire bears a load of 100 kg?

Answer 1

Given: M = 100 kg, L = 50 m, A = 0.01 × 10^-4 m

To find: Stress

Formula: Stress = `"F"/"A" = "Mg"/"A"`

`"Stress" = (100 xx 9.8)/(0.01 xx 10^-4) = 9.8 xx 10^8 "N"//"m"^2`

The stress in the wire is 9.8 × 10⁸ N/m².