1. The problem statement, all variables and given/known data At t = 0, a projectile is located at the origin and has a velocity of 20 m/s at 40° above the horizontal. The profile of the ground surface it strikes can be approximated by the equation y = 0.4x – 0.006x2, where x and y are in meters. Determine: (a) the approximate coordinates of the point where it hits the ground, (b) its velocity and direction when it hits the ground, (c) its highest point in flight and, (d) the greatest distance above the ground. *****Excel table and graph are attached. 2. The attempt at a solution a) Determine the approx. coordinates of the point. I plotted the data in excel and obtained the equations for both. I tried to figure this out algebraically, but my answers were way off. My values for x were 0 and 12.95. So I plugged the two equations in my Ti-89 titanium and checked the intersection with that. And it made more sense. x = 29.47 m y = 6.58 m So I believe that this is my answer for part a. b) Velocity and direction when it hits the ground? I’m a bit stuck on figuring this part out. Any assistance on this would be great! I think I can use the x and y coordinates from part a to figure this out? Maybe? c) Highest point in flight? I think this meant without considering the equation of the surface. So, I used the following equation: v2 = (vo)y2 + 2*a*h h = 8.43 m d) Greatest distance above the ground? I believe this means to consider the surface equation and find the greatest distance. This part I’m also having trouble with. I’m sure it’s something I have done, but I can’t remember.