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Working out the initial velocity

  1. Apr 4, 2014 #1
    1. The problem statement, all variables and given/known data
    Tom decided to attempt to jump a 200m wide river on rocket skates. He built a 60m long ramp with an angle of 30° to the horizontal and plans to land on a mattress at ground level. Determine the launch speed necessary for Tom to be successful.

    2. Relevant equations

    I read up on this:
    vo = √Rg/Sin(2 * θ)

    3. The attempt at a solution

    vo = √200 * g/Sin(2 * 30)
    vo = √200*g/0.866

    Not a homework question, but I stumbled upon this and want to learn this stuff.
     
  2. jcsd
  3. Apr 4, 2014 #2

    NascentOxygen

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    Staff: Mentor

    Hi theholychilli. http://img96.imageshack.us/img96/5725/red5e5etimes5e5e45e5e25.gif [Broken]

    I very much doubt that there is a neat formula going around which you can memorize for this problem. Much better that you learn to figure it out for yourself.

    The first step is to draw a large clear diagram, and mark on all the relevant details you know. See how you go with that.

    I think there is an assumption that is going to have to be made about the skates, too ....
     
    Last edited by a moderator: May 6, 2017
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