The problem is to give a projectile an initial velocity such that it lands a certain height and distance away (2D system, only x and y dimensions). The forces to account for are gravity and air drag.(adsbygoogle = window.adsbygoogle || []).push({});

The knowns are

x is target horizontal distance to travel

y is target height to travel

g is gravity

Any drag related constants can be found through experimentation I guess.

http://www.pha.jhu.edu/~broholm/l5/node3.html [Broken]

This web page almost got me started. It has the equations

x = vi_x*t

y = vi_y*t + g*t^2/2

vi, the initial velocity, is what I am solving for. I can solve the above for vi, obviously, but the above does not account for any air drag.

If you could tell me how to put air drag into the above 2 equations, that would be great.

This is for a computer program, so if there is a solution with some approximations I can probably work them in there.

Thanks,

-Joel

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# Homework Help: Projectile Motion With Drag [Aprox's are Welcome]

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