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Building having very wide Foundation Tool having very small surface areaThe ratio of thrust and area of cross sectionThe unit of pressure in SI systemDecreasing the pressure exerted by an object without changing its area of contactMatch the following... |
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Answer» Answer: Thrust and Pressure Have you ever wondered why a camel can RUN in a desert easily? Why an army tank WEIGHING more than a thousand tonne rests upon a continuous chain? Why a truck or a motorbus has much WIDER tyres? Why cutting tools have sharp edges? In order to address these questions and understand the phenomena involved, it helps to introduce the concepts of the net force in a particular direction (thrust) and the force per unit area (pressure) acting on the object concerned. Let us try to understand the meanings of thrust and pressure by considering the following situations: Situation 1 : You STAND on loose sand. Your feet go deep into the sand. Now, lie down on the sand. You will find that your body will not go that deep in the sand. In both cases the force exerted on the sand is the weight of your body. |
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