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Is there any formula for underwater falling sphere which can measure the velocity of that sphere at any time before it reaches its terminal velocity? A sample question is: I dropped a sphere into water with 0m/s initial velocity. what will be the velocity of that sphere after 3s? {the radius and density of that sphere is .005m & 2500kgm-3, the viscosity coefficient of water is .00016Nsm-2.}