1. The problem statement, all variables and given/known data I had to calculate initial and final velocities for a rocket launch. Data are as follows: horiz displacement = 17.5m time = 3.5 s launch angle = 40 deg angle to apex from 20m = 11 deg net vertical displacement = 0 2. Relevant equations I used the following equations: d = vit + (a[t^2])/2 vfy^2 = viy^2 + 2ad 3. The attempt at a solution calculations for initial velocity horizontal dx = vixt + (aav[t^2])/2 17.5 m = 3.5s(vix) + (-9.81 m/s^2[3.5s^2])/2 77.6 m/3.5 s = vix 22.2 m/s = vix vertical 0m = viy(3.5s) + (-9.81 m/s^2[3.5s^2])/2 60.1 m/3.5s = viy viy = 17.2 m/s then final velocity vfy^2 = viy^2 + 2ady = (17.2 m/s)^2 + 2 (-9.81m/s^2)(0) = -17.2 m/s ? I used d = vit -(a[t^2])/2 to calculate this again and got the same answer. It doesn't seem right that the final velocity would be the same magnitude as the initial velocity... is this answer correct? It also doesn't make sense that we had to measure the launch angle and angle to the apex if they aren't required to solve the problem Also, since horizontal velocity is constant, wouldn't the final horizontal velocity be the same as the initial horizontal velocity? Thanks.