Question 16.5: Young’s Modulus for a particular wood is 1×10^10 Nm^-2. A wooden chair has four legs each of length 42 cm and cross sectional area 2×10^-3 m^2. Hamza has a mass of 100 kg.
(a) What is the stress on each leg of the chair when Hamza stands on the chair?
(b) By what amount do the chair legs shrink when Hamza stands on the chair?