Practice question
Question
A 65kg person stands on two bones, each with area 20cm2. What is the average pressure on the bones? (Take g\=10m/s2)
Explanation
Pav = FA, F = mg = 65×10 = 650N. Total area A = 2×20×10−4 = 4.0×10−3m2. Pav = 6504.0×10−3 = 1.625×105Pa. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 1.625 × 10⁵ Pa. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.