I am having no luck with my writeup. We did two related practicals: shot a rocked straight up to find the height, and then shot out at angles to obtain a range. For the first one, two angles were obtained using a clinometre, then averaged: d = 30 θ = 60, 69 Av. θ = 64.5 d = 60 θ = 46, 32 Av. θ = 39 From there, h (see attached diagram) was worked out: Tan64.5 = h/30 h = 30 x Tan64.5 h = 64.9m Tan39 = h/60 h = 60 x Tan39 h = 48.6m This is what's confusing me. How do these measurements relate to projectile motion? What am I supposed to be working out with them? The next part of the practical involved finding the maximum range. I have the results, but I'm not sure exactly what I'm supposed to be finding with them. We were required to research projectile motion ourselves, and I'm guessing I'm in over my head. Any help would be greatly appreciated, so thank you in advance!