ÃŽâ€V = (800 • 9.81m/s^2) • Ln(45/30) Think you can solve this one by yourself? Go ahead, and the answer will be below if you can't figure it out. 800 x 9.81m/s^2 = 7848. Log2.7182818285(1.5) = 0.40546510811 7848 x 0.40546510811 = 3812.1 m/s. i think it should be 3182.1 m/s , Unless i'm doing something wrong. i'm guessing it was just a typo calculated with 9.82 m/s^2 the solution should be 3185.3 m/s