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Homework Help: Homework Problem related to acceleration due to gravity and force.

  1. Dec 20, 2011 #1
    1. The problem statement, all variables and given/known data

    Bill throws a 10.0-g ball straight down from a height of 2.0m. The ball strikes the floor at a speed of 7.5m/s. What was the initial speed of the ball.

    2. Relevant equations

    Can you provide the proper formula and solution to solve this problem?


    3. The attempt at a solution
    I tried using the following formula, but realized it was probably wrong.
    vf2= vi2 +2gd
    Vf and vi are to the second power
    g= gravity acceleration 9.8
    d- displacement
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Dec 20, 2011 #2

    Doc Al

    User Avatar

    Staff: Mentor

    That's an excellent way to solve this problem. Give it a shot. (Careful with signs.)
     
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