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One problem I just did asked me for the minimum amount of info needed for determining the range of an object according to projectile motion. I chose initial velocity, angle, and value of gravity. The correct answer is initial velocity and value of gravity. The solution says that once we know the initial velocity then we can break it up into its x and y components and then find the range. How would you determine the x and y components of the initial velocity vector without the angle? Thanks!