Practice question
Question
A 55kg person stands on two bones, each with area 14cm2. What is the average pressure on the bones? (Take g\=10m/s2)
Explanation
Pav = FA, F = mg = 55×10 = 550N. Total area A = 2×14×10−4 = 2.8×10−3m2. Pav = 5502.8×10−3 = 1.964×105Pa. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 1.96 × 10⁵ Pa. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.