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**1. A baseball (m=140g) travelling 32 m/s moves a fielder's glove backward 25 cm when the ball is caught. What was the average force exerted by the ball on the glove?**

## Homework Equations

The only equation I can find in my notes that doesn't ask for the m of the glove is

F=ma=m[(v2-v1)/t]

Then for velocity its v=delta x/delta t

## The Attempt at a Solution

v=x/t -> t=x/v=.25m/32 m/s =0.0078s

F=(140g)(0-32 m/s /0.0078s) = -574358.97

which I'm pretty sure is wrong... yet I'm not sure where I went wrong, or if I was even on the right track in the first place...

And random other question:

If you drop an object, what's the formula to figure out its acceleration? I mean, it has something to do with the weight as well as g, but I don't think it's a=mg, is it? (considering W=mgh, it just doesn't seem right to me)