Question

Explain the following:
1-It is difficult to walk with pointed heels footwear then with regular flat heels
2-Railway tracks are laid on wooden,cemented or iron sleepers
3-school bags are provided with wide strips
4-A camel can walk easily on sand as compared to a horse
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Answer 1

Answer:

Railway tracks are laid on large sized wooden sleepers so that the thrust due to the weight of train is spread over large area . This reduces the pressure on the ground which would prevent the yielding of the ground.

Answer:School bags are provided with large wide straps to carry them because it increases the surface area in contact with the shoulder and reduce the pressure of the shoulder of the students shoulder.

Answer: because camel foot have large surface area so there is less pressure on sand and horse foot surface area is small so there insert a pressure and horse leg sink into the sand.

Explanation:

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