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Homework Help: 10 m dive. Time and horizontal displacement is known.

  1. May 27, 2015 #1
    1. The problem statement, all variables and given/known data
    A diver jumps from a 10 m platform.Time in air is 2.3 s. Horisontal displacement is 4 m.
    What is the divers initial velocity and angle?

    2. Relevant equations
    No idea :'(
    3. The attempt at a solution
    No idea :'(
  2. jcsd
  3. May 27, 2015 #2
    suppossed initial velocity as Vo and angle is θ. horisontal displacement = Vo cosθ t. so that Vo cosθ = 40/23. vertical displacement = Vo sinθt - 1/2 g t2. so that Vo sinθ = 329/46 (for g=10). by comparison with Vo sin θ and Vo cos θ obtained tan θ = 4,1. in such a way that θ = tan-1 4,1. and Vo = 7,37.
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