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21. What is buoyant force?22. What is thrust?23. Derive work Energy Theorem24. Derive conservation law of energy25. The linear momentum of a body of mass 2 kg is16 kg ms^-1. What is the kinetic energy?

Answer»

In physics, buoyancy or upthrust, is an upward force exerted by a fluid that opposes the weight of an immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid. Thus the pressure at the bottom of a column of fluid is greater than at the top of the column.



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