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Homework Help: How to measure the Voy

  1. Apr 29, 2007 #1
    I used to be really good at measuring stuff and all in projectile.But after a while i forgot how to measure the Voy(initial vertical velocity)
    si it like Voy=Vo sin(0[angle sign])
    but how does an object with an initial velocity of 50 m/s and an angle of 30 degrees have an Voy (or Vy) of 24.99?
  2. jcsd
  3. Apr 29, 2007 #2


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    Staff Emeritus
    Science Advisor

    Firstly, you are not measuring the initial vertical velocity; you are calculating it from the angle of projection and the total inital velocity.

    Yes, the vertical initial velocity is given by V0sin(theta)-- you can see this by drawing a diagram: the initial velocity and its horizontal and vertical components form a right angled triangle. Use trigonometry on this triangle.
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