1. The problem statement, all variables and given/known data A ball rolls horizontally off the top of a stairway with a speed of 1.52 m/s. The steps are 20.3 cm high and 20.3 cm wide. Which step does the ball hit first? 2. Relevant equations 3. The attempt at a solution The book says it's the third step. I tried, using equations: x-x0=V0*Cos(theta0)*t y-y0 = -1/2*g*t^2 Where x0 and y0 are both 0 x and y are both either 1 * 20.3 * 10^-2 or 2 * 20.3 * 10^-2 or 3 * 20.3 * 10^-2 etc... And see where the time in the two equations would be equal. It wasn't the same time for the third step (3*20.3) I got t=0.4 for the x part of the motion and t=0.35 for the y part of the motion What am I doing wrong?