How to calculate initial velocity and launch angle? (Projectiles)

  1. 1. The problem statement, all variables and given/known data
    A bean bag launcher is used to shoot a bean bag at a corn hole board. The bag is released at a height of .61m above the ground. The front of the board is 5.18m from the location where the launcher releases the bean bag. The back of the board stands .31 m off the ground; the board has a constant slope.

    It takes .900 seconds for a bean bag to reach the very back of the board when launched at some initial angle. Given this information, find the original velocity of the bean bag as it is launched, and the angle of launch.

    2. Relevant equations

    3. The attempt at a solution
    Last edited by a moderator: Jan 12, 2013
  2. jcsd
  3. cepheid

    cepheid 5,194
    Staff Emeritus
    Science Advisor
    Gold Member

    Welcome to PF, puppy143158

    You have shown know attempt at a solution, which is against the PF rules. You have been warned.

    Here is a hint:

    - you know the starting and ending heights. Plugging these, along with the flight time, into the equation for vertical distance vs. time should allow you to solve for the vertical component of the velocity.
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