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Force exerted over a distance

by kaiazad
Tags: distance, exerted, force
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kaiazad
#1
Oct21-09, 02:25 AM
P: 2
1. The problem statement, all variables and given/known data
The fastest pitched baseball was clocked at 46 m/s. If the pitcher exerted his force (assumed to be horizontal and constant) over a distance of 1.0 m, and a baseball has a mass of 145 g.
What force did the pitcher exert on the ball during this record-setting pitch?

2. Relevant equations
f=ma


3. The attempt at a solution
I know that newtons are (kg*m)/sec^2, but I only have a velocity, not an acceleration, so I can't figure out the right force.
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mathfeel
#2
Oct21-09, 02:39 AM
P: 181
Quote Quote by kaiazad View Post
1. The problem statement, all variables and given/known data
The fastest pitched baseball was clocked at 46 m/s. If the pitcher exerted his force (assumed to be horizontal and constant) over a distance of 1.0 m, and a baseball has a mass of 145 g.
What force did the pitcher exert on the ball during this record-setting pitch?

2. Relevant equations
f=ma


3. The attempt at a solution
I know that newtons are (kg*m)/sec^2, but I only have a velocity, not an acceleration, so I can't figure out the right force.
Not to give away the answer: There is a formula that relates acceleration, initial velocity, final velocity, and distance traveled. Since you know three of the four items, with it you can find the acceleration, and hence the force.

Go find it in your textbook.
kaiazad
#3
Oct21-09, 02:54 AM
P: 2
Figured it out! thanks!


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