2020 CAIE AS & A level May June Physics Paper 13 Q. No. 20 (9702/13/M/J/20) by Sajit C Shakya

2020 CAIE AS & A level May June Physics Paper 13 Q. No. 20 (9702/13/M/J/20) by Sajit Chandra Shakya from Nepal Chapter - PROPERTIES OF MATTER The diagram shows a simplified model of a building with four identical heavy floors. The spacing of the bottom floor from the ground is twice that of the spacing between the floors. Between each floor are equal numbers of vertical steel supporting rods of negligible mass compared with the floors. The rods are of different diameters so that the stress in each rod is the same. What is the ratio?