1. The problem statement, all variables and given/known data A ball is thrown with a velocity of 20.0 m/s [30 degrees] and travels for 3.0 s before it strikes the ground. Find the a) height from which it was thrown. b) the maximum height of the ball. 2. Relevant equations a) dx = vx • t ... I don't even know what to do for part A. b) v2f = v2i + 2ad 3. The attempt at a solution a) I absolutely have no clue what to do for part A. I first thought to use triangles and tried to find the distance the ball travelled using the velocity I found, but it doesn't even work. b) I realized that at the maximum height, the velocity of the object will me 0 m/s, so I tried to find the distance from that point to the ground to find the maximum height. I found the initial velocity to be 10 m/s using SOH and i used the above formula. viy: 10 m/s vfy: 0 m/s g(a): -9.81 m/s2 02 m/s= 102 m/s + 2 • -9.81 m/s2 • d 0 m/s = 100 m/s + -19.62 m/s2 • d -100 m/s = -19.62 m/s2 • d d = 5.1 m It's not the right answer, so I don't know where I went wrong. I don't know if any of what I did makes sense, I'm so lost in projectile motion.