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Homework Help: Projectile Motion From A Cliff

  1. Feb 14, 2010 #1
    1. The problem statement, all variables and given/known data
    A projectile is fired into the air from the top of a 200-m cliff above a valley. It's initial velocity is 60 m/s at 60 degrees above the horizontal. Where does the projectile land?


    2. Relevant equations
    delta x = intial velocity of x * t
    delta y = -.5*g*t

    3. The attempt at a solution
    I solved for time and got 6.39s. When I put this back in for delta x I get 191.7m. However according to my professor the results should be .41km. Any ideas? Thanks!
     
  2. jcsd
  3. Feb 14, 2010 #2
    You have an initial speed in the y direction, 60sin60.
     
  4. Feb 14, 2010 #3
    Thanks.
     
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