Question

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Answer 1

Answer:

1) The tools meant for cutting and piercing always have sharp edges because the larger the area,the pressure would be less

1) The tools meant for cutting and piercing always have sharp edges because the larger the area,the pressure would be less2) Sportsman use shoes with spikes to increase the force of friction between the shoes and the ground. The increased force of friction give them a better grip while running

Explanation:

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Answer 2

Answer:

1) According to the formula P=F\A force is directly proportional to the pressure. When the tool will be sharp it means that the surface area reduces thus, in this way more force can be applied on an object and it can be cut easily and quickly. So cutting tools always have sharp edges not blunt edges.

2)Spikes increase the surface of the shoes & make it rough which results in an increase in friction. This helps to have more grip on the floor and chances to slip reduces. This makes it easy for sportsmen to walk or run as their grip on the ground increases.