Practice question
Question
A 60kg person stands on two cylindrical bones, each of cross-sectional area 15cm2. What is the average pressure on the bones? (Take g\=10m/s2)
Explanation
Pav = FA, F = mg = 60×10 = 600N. Total area A = 2×15×10−4 = 3×10−3m2. Pav = 6003×10−3 = 2×105Pa. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 2 × 10⁵ Pa. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.