1. The problem statement, all variables and given/known data A cannonball is launched horizontally from the top of a tall cliff with a horizontal speed of 45.0 m/s. The trajectory of the ball is shown in the diagram at the right. Determine the magnitude of the horizontal velocity and the vertical velocities of the cannonball after each of the 1.0 second time intervals. Use -9.8 m/s/s to calculate the values. find horizontal velocity for t=1 second, t=2 seconds, t=3 seconds, t=4 seconds 2. Relevant equations kinematic equations 3. The attempt at a solution i think i would use the equation d=vit+1/2at^2 so i'd do 1/2(9.8)(1)^2 so it would be 4.9?