This is driving me(adsbygoogle = window.adsbygoogle || []).push({}); nuts.

A stone with weight w is thrown vertically upward into the air from ground level with initial speed v(i). If a constant force f due to air drag acts on the stone throughout its flight, (a) show that the maximum height reached by the stone is

h = v(i)^2 / 2g(1+f/w)

and (b) show that the stone's speed just before impact with the ground is

v = v(i) (w-f/w+f)^1/2

I've been working through these for ages and I'm just lost. I know I need the conservation of energy equation 1/2mv^2 = mgh and probably the kinetic motion equation 2a(delta x) = v(f)^2 - v(i)^2, but I'm just not sure what to do with them.

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# Homework Help: Conservation of energy proof

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