i dont know why im having trouble on this.... In one contest at the county fair, a spring-loaded plunger launches a ball at a speed of 3.50 m/s from one corner of a smooth, flat board that is tilted up at a 20 degree angle. To win, you must make the ball hit a small target at the adjacent corner, 2.45 m away. At what angle theta should you tilt the ball launcher? a along the y-axis is: 3.3518m/s^2 i dont know what to do next... please help i know that youre supposed to look at it when it reaches the top of its arc when vf=0m/s vi=3.5m/s d= 1.225m t=? a(ball)=? a (y-axis): 3.3518m/s^2 theta=?