Problem 1.8 - Problem 1.8 Given: [Difficulty: 2] Small...

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Problem 1.8 [Difficulty: 2] Given: Small particle accelerating from rest in a fluid. Net weight is W, resisting force is F D = kV, where V is speed. Find: Distance required to reach 95 percent of terminal speed, V t . Solution: Consider the particle to be a system. Apply Newton's second law. Basic equation: F y = ma y Assumptions: 1. W is net weight. 2. Resisting force acts opposite to V. Then, dV W dV dt g dy FW k V = m a m V yy =− = = or VdV k Wg d y 1V = At terminal speed, a y = 0 and W t k VV ==
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This note was uploaded on 10/19/2011 for the course EGN 3353C taught by Professor Lear during the Fall '07 term at University of Florida.

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