Question

# A girl weighing 50 kg is standing on a pencil heels. Each having an area of cross-section 1cm2. An elephant weighing 200 kg and foot area of cross-section of 250 cm2 standing on the floor. Which of the two exerts more pressure on the floor? (Given acceleration due to gravity = 10 m/s2)

Solution

## Weight of the girl = 50 kg (Given) Area of the cross-section = 1 cm2 (Given) $\mathrm{P}=\frac{\mathrm{Force}}{\mathrm{Area}}$ Force = Weight of the body = 50 kg  1 cm = $\frac{1}{100}$ P = 500000 Nm–2 Weight of the elephant, W = 200 kg Area of the cross-section of foot A = 250 cm2 A = 0.0250 m2 Pressure exerted by the elephant on land: ScienceEveryday ScienceStandard VIII

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