A girl of weight 600N sits on a 3-leg chair which weighs 60N. Each chair leg presses the floor in a circle with a diameter of 5cm. Find the average pressure exerted on the floor by each chair leg.

Question

Physics

Jamison Boyd

25 February, 01:22

A girl of weight 600N sits on a 3-leg chair which weighs 60N. Each chair leg presses the floor in a circle with a diameter of 5cm. Find the average pressure exerted on the floor by each chair leg.

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Answers (2)

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Jack Bender · Answer 1

Jack Bender 25 February, 04:13

0

84033.6134 N/m^2 is the pressure

Isla Osborn · Answer 2

Pressure = total force/total area

Total force = 660 Newton's

Total area:

Each leg contacts the floor with an area of πr^2=π (0.025m) ^2=0.002m^2.

Total contact area for all 3 legs = 0.006 m^2.

Pressure = (660N) / (0.006 m^2)

= 110,000 N/m^2 = 110,000 Pascal's.