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You and your chair together have a mass of about 100 kg. If weight is evenly...

You and your chair together have a mass of about 100 kg. If weight is evenly distributed and the chair rests on 4 legs, each with a contact area of about 3 cm2,

find the average pressure on the legs in kPa. Ignore the pressure due to the atmosphere.

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Answer #1

Given : Mass of body & chair : 100kg , Contact area of each leg : 3 cm2 , and chair has 4 legs.

Solution: Mass divided on each leg = 100kg /4 = 25 kg ,

Force exerted by each leg on floor ={ 100kg x 10 m/s2 } / 4 = 250 N ------( here 10 m/s2

Average force on legs = 250 N / 3x10-4 m2 =833.33 kPa

Final Ans = 833.33 kPa is the average pressure on the legs

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