Question

Please guys answer the question and don't send unnecessary messages only answer
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Answer 1

Answer:

a. Heavy vehicles have broad tyres because broad tyres have large area of contact and less pressure on the ground. Because of this, heavy vehicles (like tractor) can move even on soft roads and fields without sinking.

b. It is because the surface of the fruit is large and a blunt knife occurs more surface than a sharp knife so it doesn't cut easily while when we use a sharp knife it cuts easily because it occurs a small surface of fruit then that of blunt knife.

c. The pressure exerted by a body is given by the relation P = F/A. When we stand on loose sand our area in contact with sand is small, therefore, pressure is large. Hence, we go deep. But while lying down the area in contact becomes large.