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Homework Help: Ball hitting ramp

  1. Sep 25, 2005 #1
    http://img384.imageshack.us/img384/5267/physicsproblem3aq.jpg [Broken]

    This is my problem.

    I called the angle between ramp and horizontal theta.

    Then, i formed a rectangle between V0 and the ramp, and found the angle between the ramp and V0 is also theta.

    Then, i repositioned my coordinate system, so that the x axis is parallel to the ramp's hypotenuse.

    Then, i modeled:
    (delta) x = V0cos(theta)* t + 1/2 g sin(theta) * t^2
    (delta) y = V0sin(theta) * t + 1/2 g cos(theta) * t^2

    and i plugged it into the pythagorean theorem.

    when i solved for theta, i dont get a pure number, so i know its wrong.

    need major help :cry:
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Sep 25, 2005 #2


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    Science Advisor

    How did you "plut it into the pythagorean theorem"? What right triangle did you use? What is the hypotenuse, legs?
  4. Sep 25, 2005 #3
    the triangle legs was delta x and delta y, and the range was the hypotenuse
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