JEE Main2017PhysicsMechanical Properties of SolidsActual
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:
Options
- A1 81
- B9
- C1 9
- D81
Correct answer
B. 9
Step-by-step solution
Stress = F A = M g A = ρ V o l u m e . g A = ρ 9 3 x 3 g 9 2 x 2 = 9 t i m e s