On Jul 17, 5:46=A0am, Quinch <qui...@[EMAIL PROTECTED]
> wrote:
> Just a quick question - I reckon this might be an appropriate newsgroup,
> but it's still a shot in the dark since I couldn't find the FAQ.
>
> At any rate, I could use some help with a math/physics problem and would
> be grateful for any assistance. The question is how to calculate the
> time needed for an object thrown in the air to fall to a certain point.
> Thus far all I know for certain is that it's a combination of two
> acceleration events - the first is the upwards motion, which is, I
> assume, equal to the time needed for an object to accelerate from a
> standstill to its initial velocity, and the downward motion, equal to
> the time needed for the object to accelerate from the apex of the rising
> stage to the "ground". I've been looking around, but for the most part,
> plugging the numbers into the formulas I found got me calculating square
> roots of negative numbers, with all the nonsense that implies.
>
> So, given the initial height X, the stopping height Y, the initial
> upward velocity A and the gravity deceleration/acceleration B, how would
> I go about calculating the time needed for the arc to complete?
>
> Regards,
>
> Quinch
the usual equation to use, given what you have is:
s =3D v_i * t + (a/2) * t^2
You know S, V_i, and a, so t is just a quadratic solve.
|
