Question

A 50 kg girls wearing heel shoes balances on a single heel. The heel is circular with a diameter 1 cm. The pressure exerted by the heel on the horizontal floor is (Take

• A. $6.4 \times 10 ^ { 4 } \mathrm {~Pa}$
• B. $6.4 \times 10 ^ { 5 } \mathrm {~Pa}$
• C. $6.4 \times 10 ^ { 6 } \mathrm {~Pa}$
• D. $6.4 \times 10 ^ { 7 } \mathrm {~Pa}$

Answer 1

Answer: (C)

$6.4 \times 10 ^ { 6 } \mathrm {~Pa}$

Answer 2

Here, m = 50 kg,

$\therefore$ Pressure exerted by the heel on the horizontal floor is

$= \frac { 4 \times 50 \mathrm {~kg} \times 10 \mathrm {~ms} ^ { - 2 } } { 3.14 \times \left( 10 ^ { - 2 } \mathrm {~m} \right) ^ { 2 } }$

$= 6.4 \times 10 ^ { 6 } \mathrm {~Pa}$