Practice question
Question
A 75kg person stands on two bones, each with area 24cm2. What is the average pressure on the bones? (Take g\=9.8m/s2)
Explanation
Pav = FA, F = mg = 75×9.8 = 735N. Total area A = 2×24×10−4 = 4.8×10−3m2. Pav = 7354.8×10−3 = 1.53125×105Pa. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 1.53 × 10⁵ Pa. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.