Explain giving scientific reasons :
1.) The nail is pushed into a wooden plank from its pointed end.
2.) The shoulder bags are provided with broad straps.
3.) Porters place a round piece of cloth on their head, when they have to carry heavy loads.
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Answer:
answer of all these questions lies in the fact that pressure is indirectly proportional to area of contact if force remains constant
Explanation:
*the nails is pushed from its pointed end so that increased pressure acts on plank and it could easily pierce into wooden plank
*the shoulder bags have broad straps to reduce pressure on shoulders by increasing area of contact
*porters place round piece of cloth to increase surface area of weight to reduce pressure.
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