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## Homework Statement

Steel ball with a mass 17 grams, is launched at a speed of 6 m/s, into someones eye. The ball comes to a rest over a distance of 1mm.

A) What is the average acceleration experienced by the ball to stop it?

B) What is the deaccelerating force that must be exerted on the ball (by the eyeball), and thus, what is the average force on the eyeball?

## Homework Equations

## The Attempt at a Solution

I tried using the Vf^2 - Vi^2 = 2a*d (where d is displacement, vf is final veloctiy, vi is initial velocity and a is acceleration) but came out with -18m/s^2 for the acceleration. I dont think that is right however

Any help is greatly appreciated