[X] A cyclist freewheeling on a level road experiences a retardation (i.e., a negative acceleration) that is proportional to the square of his speed. His speed is reduced from 20 metres per second to 10 metres per second in a distance of 100 metres. Find his average (with respect to time) speed during this period.
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A first-order differential equation is of the form dy/dx = f(x,y). Show more…
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