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Am i doing this right? A cannon is shot at a 30 degree angle above the horizontal with a velocity of 240 m/s. What is the range of this shot? Range = Vm^2 sin2(theta) / (g) (240m/s^2)sin(2(30)) / (10ms^2) = 4988 meters?

I really need help with these questions. My teacher doesn't provide me with anything to go on only some formulas and maybe 3 examples. It would be greatly appreciated! 1. Find the speed of a rock which is thrown off the top of a 20 m tall building at 15 m...