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## Homework Statement

Its the drop zone in kings dominion

d = 82.9 m

initial velocity = 0

final velocity (before the brakes are applied) = 32.19 m/s

i know there is gravity downward and airresistance upward.

I need to find the mass of the object.

## Homework Equations

First i found the acceleration using

v

_{1}

^{2}= v

_{0}

^{2}+ at

a = 6.25 m/s

^{2}

And i am confused since air resistance is directly proportional to objects velocity. Is the acceleration i found is the final acceleration before the brakes are applied or is it the average acceleration.

## The Attempt at a Solution

I need to find the mass but i can't think of any way to start.

Any help is appreciated