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Question
Mention two cases in which it is useful to decrease the pressure exerted by a force and two cases in which it is useful to increase the pressure exerted by a force.
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Solution
Useful to decrease pressure(1) Snow boots have large surface area to minimize pressure.(2) When you hang bag in two shoulder it feels lighter than when you having it in one hand.Useful to increase pressure(1) Nails have pointed ends to increase pressure by minimizing surface area.(2) Knifes are sharpened to increase pressure or apply maximum pressure with less force.
(1) Snow boots have large surface area to minimize pressure.
(2) When you hang bag in two shoulder it feels lighter than when you having it in one hand.
Useful to increase pressure
(1) Nails have pointed ends to increase pressure by minimizing surface area.
(2) Knifes are sharpened to increase pressure or apply maximum pressure with less force.
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