JEE Main 2017 Physics question
A man grows into a giant such that his linear dimensions increase by a factor of 9. Assuming that his density remains same, the stress in the leg will change by a factor of-
Answer: (A)
Solution
Weight ∝ volume ∝ and cross-sectional area ∝ , so stress = weight/area ∝ L. It increases by a factor of 9.