A retarding force is applied to a body moving in a straight line so that, during an

Chapter 2, Problem 2/30

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A retarding force is applied to a body moving in a straight line so that, during an interval of its motion, its speed v decreases with increased position coordinate s according to the relation , where k is a constant. If the body has a forward speed of 2 in./sec and its position coordinate is 9 in. at time t 0, determine the speed v at sec.

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