Arrange the following in the decreasing order of pressure exerted on the ground: a) A man stands with one foot flat on the ground b) A man kneels with both knees on the ground c) A man stands with toes of one foot on the ground d) A man lies with his back flat on the ground e) A man stands with both feet flat on the ground pls brainly help
Answers
Answer:
C, A, E, B, D
Explanation:
The decreasing order of pressure exerted on ground is
(c) > (a) > (e) > (b) > (d)
Explanation:
We know that
Pressure exerted = Force/Contact Area
Thus the pressure is inversely proportional to contact area
i.e. if the contact area will be less then pressure exerted will be more and vice versa
In this case the force will be equal to the weight of the man
We need to compare the contact areas in each situation
(a) In this case, the contact area will be that of the area of one foot
(b) In this case the contact area will be both the knees and front of the both feet
(c) The contact area will be that of one toe only
(d) The whole back of the man will provide the contact area
(e) In this case, the contact area will be due to both the feet
Clearly we can see that decreasing order of contact area is
(d) > (b) > (e) > (a) > (c)
Thus, the decreasing order of pressure will be
(c) > (a) > (e) > (b) > (d)
Hope this answer is helpful.
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