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angelhusted213
22.01.2020 •
Engineering
5) a 80-kg man has a total foot imprint area of 480 cm2. determine the pressure this man exerts on the ground if (a) he stands on both feet and (b) he stands on one foot.
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Ответ:
The pressure exerted by this man on ground
(a) if he stands on both feet is 8.17 KPa
(b) if he stands on one foot is 16.33 KPa
Explanation:
(a)
When the man stand on both feet, the weight of his body is uniformly distributed around the foot imprint of both feet. Thus, total area in this case will be:
Area = A = 2 x 480 cm²
A = 960 cm²
A = 0.096 m²
The force exerted by man on his area will be equal to his weight.
Force = F = Weight
F = mg
F = (80 kg)(9.8 m/s²)
F = 784 N
Now, the pressure exerted by man on ground will be:
Pressure = P = F/A
P = 784 N/0.096 m²
P = 8166.67 Pa = 8.17 KPa
(b)
When the man stand on one foot, the weight of his body is uniformly distributed around the foot imprint of that foot only. Thus, total area in this case will be:
Area = A = 480 cm²
A = 0.048 m²
The force exerted by man on his area will be equal to his weight, in this case, as well.
Force = F = Weight
F = mg
F = (80 kg)(9.8 m/s²)
F = 784 N
Now, the pressure exerted by man on ground will be:
Pressure = P = F/A
P = 784 N/0.048 m²
P = 16333.33 Pa = 16.33 KPa
Ответ:
Answer with Explanation:
1. Hindi ko kayang mabuhay nang walang kapwa dahil naniniwala akong ang pakikisalamuha sa ibang tao ay kailangan para mabuhay nang maligaya at buo ang pagkatao.
2. Sang-ayon ako sa pahayag na "No man is an island." Tayo ay nilikha ng panginoon upang magtulungan dito sa mundo. Hindi natin kayang mamuhay nang mag-isa. Nakaugat sa ating mga dugo ang pakikipag-ugnayan sa ibang tao sa lipunan. Ito'y nakabubuti rin sa ating pag-iisip at sa ating kalusugan at pangangatawan.