Question

Give reason
1. tyres of tractors are wide & huge
2. it is easy to cut an apple with a sharp knife than a blunt one

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Answer 1

Because of this, heavy vehicles (like tractor) can move even on soft roads and fields without sinking. We know that more area means less pressure. Since, weight of tractors are preety heavy that is why we uses broad tire so as to divide its weight equally and hence, it prevents sinking of tractor in soil.

It is easier to cut an apple with a sharp edge of knife because in the knife with sharp edge , the area of contact between the sharp egde and knife is smaller and we know that the smaller the area of contact,the more is the pressure exerted by the sharp edge of knife and that is why ,due to the sharp edge,one has to

Answer 2

1. We know that more area means less pressure.
Since, weight of tractors are preety heavy that is why we uses broad tire so as to divide its weight equally and hence, it prevents sinking of tractor in soil.

2. It is easier to cut an apple with a sharp edge of knife because in the knife with sharp edge , the area of contact between the sharp egde and knife is smaller and we know that the smaller the area of contact,the more is the pressure exerted by the sharp edge of knife and that is why ,due to the sharp edge,one has to apply less pressure in order to cut the apple than the knife with a blunt edge which as more area of contact and we have to apply more pressure to cut it.

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