Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Average force

  1. Dec 21, 2009 #1
    1. The problem statement, all variables and given/known data
    A 0.25 kg ball moving at 13 m/s is struck by a bat and leaves the bat travelling at 19 m/s in the opposite direction to its initial direction. If contact between bat and ball lasts for 0.01 s what is the average force exerted by the bat on the ball?


    2. Relevant equations

    F= MA

    3. The attempt at a solution
    0.25X (13+19) but then what solution do i use for the time
     
    Last edited: Dec 21, 2009
  2. jcsd
  3. Dec 21, 2009 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Look up the impulse-momentum theorem.
     
  4. Dec 21, 2009 #3
    what does acceleration equal .. ??

    Change in what / change in what ... ??

    Find the initial and final velocities and change in time and u r done. ^^
     
  5. Dec 23, 2009 #4
    Average force exerted by the bat on the ball = Rate of change in momentum, juz divide what u find with time.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook