Question...?

Question

I have the equation d = 1/2at^2. I need to rearranged the equation to find t. Would it be t = the square root of 2ad?

Answer 1

1. d = 1/2at^2 given
2. d/(1/2a) = t^2 divide both sides by 1/2a
3. (d/(1/2a))^.5 = t square root of both sides

Thus t equals the square root of (d divided by 1/2a).

This equation tells you how long it would take for somethng to fall d feet, given acceleration rate a, and ignoring air friction. Example, how long wouldit take to fall 30,000 feet, assuming gravity acceleration of 32fps/s and no friction?

t = sqrt (30,000/(1/2 * 32)) = 43.3 seconds.