You just proved the pressure stays the same. 11 Calculate the pressure exerted on the ground by a 79 kg person standing on one foot.
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It seems to me that you are sometimes confusing pressure with force eg.
. If standing on BOTH feet the man shares the pressure of his weight over the surface area of BOTH feet. Science Physics QA Library Calculate the pressure exerted on the ground by a 77 kg person standing on one foot. The area under the foot of the person is 1 8 0 c m 2.
Note that the person exerts the same force on the ground no matter what her weight. Average ground pressure can be calculated using the standard formula for average pressure. A four ton elephant on the other hand standing on one foot will cause a pressure of only 250 000 Pa under that foot.
Physics questions and answers. A girl standing on one foot exerts a pressure of 6 Ncm 2 on the ground. Calculate the pressure exerted on the ground due to the weight of a 79 kg person standing on one foot if the bottom of the persons foot is a rectangle that is 13 cm wide and 28 cm long.
A boy stands on the ground. A person weighs 6 0 k g. A person is standing on the ground as shown.
Solution -As we know that Pressure Force Area. This video is an example problem regarding pressure. The area below his feet is 7 0 c m 2.
Assume that the bottom of the persons foot is 13 cm wide and 28 cm long. Where do you think is atmospheric pressure acting on his body. Thinking that two lots of the same pressure means double the pressure.
Pressure is calculated using Force Area. When a man is standing on ground all his weight is in downward direction and pressure is the force divided by area as force is maximum and area is minimum so pressure will be more when he is standing. Ground pressure is the pressure exerted on the ground by the tires or tracks of a motorized vehicle and is one measure of its potential mobility especially over soft ground.
If the bottom of the persons foot is 13 cm wide and 28 cm long. Calculate the total force acting on the ground. A static uniform net force normal to level ground at Earth sea level this is simply the objects weight divided by contact area.
The person standing up exerts more pressure on the ground. Take g 9. These were invented to help people get through deep snow by distributing the weight over a larger area and therefore making it easier to walk.
The average human exerts 16 psi and that same person with snowshoes only exerts 1 psi. When you lie down you exert the same force on the ice your weight but over a much larger area. To Find-New pressure if the area of contact is reduced to half.
In an idealized case ie. A 4 Pa 11 A 21 10 4 Pa. A person exerts 80000 Pa of pressure on the ground while standing on both feet.
What would happen to the pressure if the person then stood on only foot decreasing the area in contact with the floor to half the original. You exert more pressure on a. The ground pressure of motorized vehicles is often compared to the ground pressure of a human foot which can be 60 - 80 kPa.
20 X 104 Pa 48 X 104 Pa 21 X 103 Pa 53 X 104 Pa. BBC - h2g2 - Pressure - A835409. A 21 10 4 Pa B 48 10 4 Pa C 22 10 3 Pa D 53 10 Answer.
When walking for a time all the weight pressure is being passed through the surface area of. 65kg on a surface of 2 cm 2 eg high heel shoes will result in a pressure of 3 250 000 Pa beneath the high heels if the person is standing on the surface of planet Earth. It also applies to the feet of a walking person or machineGround pressure is measured in pascals Pa which corresponds to the United States customary units unit of pounds per square inch psi.
The pressure he exerts on the ground is 7 N c m 2. We can also write it as P₁ A₁ P ₂. A person standing close to the edge on the top of an 80-foot tower throws a ball with an initial speed of 64 feet per second.
After t seconds the height of the ball above the ground is st -16t2 64t 80 a. A person exerts 80000 Pa of pressure on the ground while standing on both feet. The maximum pressure exerted by the box is 03 Ncm 2.
What would happen to the pressure if the person then stood on only foot decreasing the area in contact with the floor to half the original. 8 m s 2. Assume that the bottom of the persons foot is 13 cm wide and 28 cm long.
A 21 x 103 Pa B 21 x 104 Pa C 48x 104 Pa D 53x 104 Pa X. The confusion may come partly from the use of the expression total pressure in the question. A person exerts 80000 pa of pressure on the ground while standing on both feet.
If Force is constant then P inversely proportional to Area P kA PA k. 8 12cm 12210913 036 4 2126fa PHYSICS 104 - HEALTH TRACK Sunday 12 January 2020 Post-Class Practice Q3The average density of the body of a fish is 1080 kgm3. The person would exert twice as much pressure on the floor 160000 Pa.
When you stand you exert pressure on the ground where do you exert more pressure. The overall pressure on the ground still doubles. Calculate the pressure exerted on the ground by a 77 kg person standing on one foot.
Calculate the pressure exerted on the ground due to the weight of a 79-kg person standing on one foot. Find the pressure exerted on the ground by the person. The problem calculates the pressure for a person wearing fl.
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