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Homework Help: Finding angle and altitude using distance and time?

  1. Sep 22, 2015 #1
    1. The problem statement, all variables and given/known data
    I need an equation for a physics project, and I'm not sure which to use. I am given the distance and time variables, however I don't have the angle or altitude they are looking for. Which equation do I need to use?

    2. Relevant equations
    Velocity related equations? fab five physic equations probably, i'm not sure.

    3. The attempt at a solution
    I'm thinking that I need to use gravity as 9.8, but don't know what the equation would be?? Thanks to those who help :P :P :P
  2. jcsd
  3. Sep 23, 2015 #2
  4. Sep 23, 2015 #3


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    That's not very clear! What "distance and time" do you mean? The distance and time at which the projective again returns to earth?
    Then the equations you use are [itex]d= v_0sin(\theta) t[/itex] and [itex]0= (-g/2)t^2+ v_0 cos(\theta)t[/itex]. That gives you two equations to solve for [itex]v_0[/itex] amd [itex]\theta[/itex].
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