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Question

Who exerts the maximum pressure?

A
Reno (weight = 500 N) standing on one foot covering an area of 50 cm2 on ground.
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B
Sam (weight = 1000 N) standing on two feet covering an area of 100 cm2 on ground.
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C
Shervin (weight = 500 N) standing on a pole of negligible weight covering an area of 2 cm2 on ground.
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D
Reno (weight = 500 N) standing on a weighing machine of negligible weight covering an area of 40 cm2 on ground.
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Solution

The correct option is C Shervin (weight = 500 N) standing on a pole of negligible weight covering an area of 2 cm2 on ground.
By definition pressure is the force acting per unit area.
In case 1, P1 = 50050 =10 Ncm2
In case 2, P2 = 1000100 =10 Ncm2
In case 3, P3 = 5002 =250 Ncm2
In case 4, P4 = 50040 =12.5 Ncm2
So, pressure exerted by Shervin is the maximum.

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