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Homework Help: Projectile Problem

  1. Nov 21, 2015 #1
    1. The problem statement, all variables and given/known data
    A ball is launched at 30 degrees. How far away will it land if dy= 56.2m (height of launch)

    2. Relevant equations

    3. The attempt at a solution
    I can't figure out how to find either vy or t
  2. jcsd
  3. Nov 21, 2015 #2


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    Heck, I can't figure out what dy = 56.2 is supposed to be. Does it have units? Is it a velocity? A distance? What?
  4. Nov 21, 2015 #3


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    You seem to be saying that dy is the height from which it was launched (compared with the landing point, presumably). But if so, there's not enough information. From the name 'dy' I would guess it might mean the maximum height reached (as in, delta y), and that the landing point is on the same level as the launch point. If so, there is enough information.
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