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Bernoulli's Principle

 

About 1738, his father published Hydraulica; this attempt by Johann to obtain priority for himself was another instance of his antagonism toward his son.
             Between 1725 and 1749, Daniel won 10 prizes from the Paris Academy of Sciences for work on astronomy, gravity, tides, magnetism, ocean currents, and the behaviour of ships at sea. He also made substantial contributions in probability. He shared the 1735 prize for work on planetary orbits with his father, who, it is said, threw him out of the house for obtaining a prize he felt should be his alone. Daniel's prizewinning papers reflected his success on the research frontiers of science and his ability to set forth clearly before an interested public the scientific problems of the day. In 1732, he accepted a post in a botany and anatomy at Basel; in 1743, one in physiology; and in 1750, one in physics.
             So how do aeroplane wings create the upward force called lift? And how can spin make a ball curve in the air?".
             In both cases, the design could be such as to create a difference between the speed of the flowing air past the object on the top and the bottom. For aircraft wings this could come from the movement of the flaps, and for the baseball it could be the presence of ridges that makes it follow a "curved" path. According to Bernoulli's theorem, such a speed differential could cause a pressure difference between the top and the bottom of the object, resulting in a net force being exerted, either upwards or downwards.
             The study of Bernoulli's theorem could really be helpful for a deeper understanding of a number of everyday occurrences wherein, evidently, Bernoulli's principle finds itself at the heart of. Its study could really lessen the speculation of these daily phenomena and offer more scientific clarifications, which are more believable to human understanding.
             In this attempt, we hope to emerge in helping others understand more our problem - how aerofoil produces lift and how spin affects a ball's movement in the air.


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