kay well here goes: An object moving with constant acceleration has a velocity v = 55.2m/s when it is at x = 6.9m and a v = 82.4m/s when it is at x = 12.4m. What is its acceleration? Now this problem qould be simple if time were given but it isn't so I'm gonna need a little bit of help please. What I did with this one was I plugged the numbers into the following equation: Vf^2 = Vi^2 +2a(xf - xi) which gave me, (82.4)^2 = (55.2)^2 + 2a(12.4 - 6.9) 6789.76 - 3047.04 = 2a(5.5) a = 340.25m/s^2 whish is needless to say, well....impossible. Is there another way to attack this problem or maybe if someone could please point out my mistake?