
#1
Nov109, 08:58 PM

P: 36

1. The problem statement, all variables and given/known data
A 0.140kg 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
Nov109, 09:17 PM

P: 19

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? 



#3
Nov109, 10:03 PM

P: 36

Okay, so I used the equation vf^2=vi^22ad.
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. 



#4
Nov209, 06:01 AM

P: 19

Average force applied by baseball on glove 


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