1. The problem statement, all variables and given/known data 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 s according to the relation v2=k/s, where k is a constant. If the body has a forward speed of 1.8 in/sec and its position coordinate is 9.2 in at time t=0, determine the speed v at t=4.0 sec. 2. Relevant equations v = ds/dt 3. The attempt at a solution I'm honestly not sure how to start this question. Suggestions would be appreciated.