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Homework Help: Projectile motion and kinematics in 2D

  1. Feb 1, 2010 #1
    1. The problem statement, all variables and given/known data
    A dolphins leaps out of the water at an angle of 35 degrees above the horizontal. The horizontal component of the dolphin's vleocity is 7.7 m/s. Find the magnitude of the veritcle component.

    2. Relevant equations
    I'm not sure what equations to use.

    3. The attempt at a solution
    No attempts either, i'm totally clueless.

    thanks for any help
  2. jcsd
  3. Feb 1, 2010 #2


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    Homework Helper

    How are the components of the velocity vector related to its magnitude?
  4. Feb 1, 2010 #3
    you know the horizontal component, and you know that horizontal component*costhetheta yields an answer of 7.7 m/s , so find vi, and solve for vertical component
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