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JEE Main
Exam
JEE Main
Subject
Physics
Chapter
Mechanical Properties of Solids

JEE Main · Physics · Mechanical Properties of Solids

A 50 kg girl wearing high heel shoes balances on a single heel. The...

A 5050 kg girl wearing high heel shoes balances on a single heel. The heel is circular with a diameter of 1.0cm1 . 0cm. What is the pressure exerted on the horizontal floor?

Options

  1. A6.24×106Pa6 . 24 \times {10}^{6}Pa
  2. B5.63×107Pa5 . 63 \times {10}^{7}Pa
  3. C4.81×106Pa4 . 81 \times {10}^{6}Pa
  4. D7.19×107Pa7 . 19 \times {10}^{7}Pa

Correct answer

A. 6.24×106Pa6 . 24 \times {10}^{6}Pa

Step-by-step solution

Given, mass of girl (m) = 50 kg

Diameter of circular heel (2r) = 1.0 cm

Radius (r) = 0.5 cm

= 5 × 10-3 m

Area of the circular heel (A) = πr2

= 3.14 × (5 × 10-3)2 m2

=78.50×10−6m2= 78 . 50 \times {10}^{- 6}m^{2}

The pressure exerted on the horizontal floor

p=FA=mgA\text{p} = \dfrac{\text{F}}{\text{A}} = \dfrac{\text{mg}}{\text{A}}

=50×9.878.50×10−6= \dfrac{\text{50} \times \text{9.8}}{\text{78.50} \times {10}^{- 6}}

=6.24×106Pa= 6 . 24 \times {10}^{6}Pa
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