1. The problem statement, all variables and given/known data 3. (I) Estimate the pressure exerted on a floor by (a) one pointed chair leg (66 kg on all four legs) of 2 area 0.020 cm , and (b) a 1300-kg elephant standing on one foot 2 area 800 cm . 2. Relevant equations P=F/A=W/A 3. The attempt at a solution I know the solution. But I don't understand why in (a) we used the mass of one leg and on (b) we used the mass of the whole elephant..even though the elepahnt was standing on one foot just like the chair was standing on one leg.