Hi! I'm quite new here, and I'm not sure wheter this is to go here or in the math section, so I'll just post it here since i guess nobody really care anyway.(adsbygoogle = window.adsbygoogle || []).push({});

I've been thinking of this for a while, but I can't seem to get it right. (I'm not that good at maths but I'm learning.)

Concider dropping a rock from a rather high altitude down to the ground. Now, using Newtonian theory, find an expression for the rocks' velocity as a function of time, that includes the fact that the gravitational attraction must become greater as the distance to Earth shrinks.

Can somebody give me a hint?

I know g=MG/r^2

What confuses me is how to integrate time in this expression,

since r=r0-gt^2/2

Finally, I don't know why but i just like these guys:

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# More accurate acceleration

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