I need to find the acceleration of gravity in my area (I live 287 meters above sea level.) I know that y = 0.5*g*t2, y=(v22-v12)/2*g, fg=m*g, and F= G*m1*m2/d^2 I placed a ramp at an arbitrary angle. I found the height of the ramp, the angle of the ramp, and the length of the ramp. I placed a cart on the ramp and let it run down to the end of the ramp, timing the whole trip. I've got all this data and I'm not sure how I would calculate g, for it is a vertical force and my ramp is somewhere in-between 90 and 45 degrees. (I have messed around with trig. but got no where). You see I haven't given you all of the data, I'm not looking for the exact answer I just need a general statement on how to find g in this situation. My teacher gave me a hint, he said to "extrapolate."