a.Calculate the pressure exerted on the floor by a man standing on both feet if the weight of his body is 300 N. Assume that the area of contact of one shoe with the ground is 150 sq cm b-How will the pressure exerted change when he is lying on the floor?
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Answer:
Pressure = 600 answer
40kg => 40*10N = 400N
area => 6 * 25 = 150cm => 1.5m
pressure => 400 * 1.5m = 600
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The pressure of an object can be defined as the force exerted per unit area.
Explanation:
- if the area of contact of one shoe is equal to 150 square CM then the area of contact of two shoe in the 2 legs of the person is equal to 300 square centimetre.
- The formula for pressure = force/ area
Given,
- The force is due to the weight of the person= 300N
- The area = 300cm² or 0.03m²
- Hence the pressure is 300/ 0.03 = 30,000 Pa
- With increase in the area on which the force is contracted there is decrease in the pressure which is exerted in that particular area
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