Average force applied by baseball on glove

  1. 1. The problem statement, all variables and given/known data
    A 0.140-kg baseball traveling 45.0 m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils backward 11.0 cm. What was the average force applied by the ball on the glove?


    2. Relevant equations

    F=ma ?

    3. The attempt at a solution

    It is the whole "backward 11.0 cm" part that confuses me.
     
  2. jcsd
  3. Clearly, the question is how can you find acceleration?

    Hint: if the ball is initially travelling at 45 m/s, and the ball comes to rest after 11 cm, what equation can you use to find acceleration?
     
  4. Okay, so I used the equation vf^2=vi^2-2ad.
    0= 45^2 - 2*a*.11m
    I ended up with 9205 m/s/s as the acceleration.

    After plugging it in to F=ma, I got 1,289N as the force. It seems too high.
    Thanks by the way.
     
  5. Excellent. That's what I got too. And, think about it. A baseball travelling 45 m/s comes to rest in only 11 cm! It takes a tremendous amount of force to stop it!
     
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