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1. The problem statement, all variables and given/known data

A 63kg person sitting on 3.5kg chair. Four legs contact the floor, each leg with circle 1.2cm in diameter. Find pressure exerted on floor by each leg of chair (weight evenly distributed).

2. Relevant equations

[{(person mass) + (chair mass)} * (9.81)] / pi (radius contact circle in meters)(4 chair legs)

3. The attempt at a solution

63kg + 3.5kg = 66.5kg total

1.2cm diameter = 0.6cm radius = 0.006m radius

area = 0.00011304 m^2 each leg

area total four chair legs = 0.00045216 m^2

P = F/A

{(66.5)(9.81)} / 0.00045216 = 1442774.68 N/m^2

...thus for one leg = 360693.67 N/m^2

answer of 3.6E5 and 3.61E5 incorrect.

Answer unit requested is Pa.

What am I missing here?

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# Chair leg pressure problem geez

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