Calculate time to destination given applied force and drag

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I have a rigidbody who has a constant force applied to it (in FixedUpdate). There is also a drag value to keep it down to a reasonable value. There is no Gravity force in the game either.

How would I determine the time it would take to reach a destination point? Another way to ask might be, how can I calculate the max velocity given a known force, mass (1), and drag?

Regardless of drag/mass, wouldn't constant force make max velocity infinite?

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Right, I am working on a fuel formula so they can't keep the constant formula... first I'd like to know how to calculate it without the limit.

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1 Answer

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This should help: http://www.grc.nasa.gov/WWW/K-12/airplane/falling.html

In this case, gravity is the constant force, direction is down, but the equations should apply directly to what you are doing.

Is the rigidbody's drag value the same thing as the drag coefficient in the formulas?

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I would think so. They seem to be using real-world metrics for everything else.

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Isn't drag a variable you set in Rigidbody? That would imply (imho) that it's a constant, not a function of current speed etc, which drag is in real life.

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