Since I need to solve this quickly, i'll post here too!! 1. The problem statement, all variables and given/known data Hi, guys. I did a project but questions are killing me right now. I was going all the tutorials but I really have no idea. What we did was water rocket project. Here are the data Ttotal - avg. 9.96 sec. Avg. Apogee - 2.94 sec. 2. Relevant equations 3. The attempt at a solution I need to find the v initial, ymax, and the maximum range. Here is how I did it For Vinitial DeltaY(0) =(Vinitial)(5.88)+(1/2)(-9.8)(5.88)^2 Vinital = 28.8m/s 5.88sec comes from avg. apogeeX2 ------> (2.94)(2) For Ymax, Ymax= (Vinital)(time)+(1/2)(-9.8)(time) (28.8)(2.94)+(1/2)(-9.8)(2.94)^2 = 42.3 m For maximum Range, I found out that cos 45 will give me maximum range so Range=(Vinital)(cos45)(time) (28.8)(cos45)(5.88) = 119.7 m Lastly, my teacher asked, "What role does the water play in making the rocket move?" He also asked for relevent formulas and a diagram illustrating the forces. Only thing we learned so far are Horizontal Projectil motion and free fall. I do not think we ever learned this. Can you please help me with this? Ive been working for entire day!! Thanks guys.