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Im trying to make an equation for a projectiles path, but this is only over a very short distance, so the projectiles curve aren't taken into account. Im including the air resistance.

This is what i have done:

m*dv/dt=-k*v2 Differential: dv/v2=-k*dt integrated: -1/v=-k*t+C when: t=0 og c=-1/v0 and we get: v=m*v0/(k*v0*t+m)

I have gotten some help doing this, but i am wondering if anyone could tell me if this is right. Another thing is that i seem to have forgotten "m", could anyone please tell me where "m" should be in the differentaded and integrated equation? i have a hard time explaing actually what i have done, but maybe you could help me.

By the way, im from Denmark so sorry for my bad english.

Thanks

- Michael

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# Motion equation

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