Zach, whose mass is $85$ kg $,$ is in an elevator descending at $11\frac{m}{s}.$ The elevator takes $2\mathrm{.}8$ s to brake to a stop at the first floor.

Part A

What is Zach's weight before the elevator starts braking?

Express your answer with the appropriate units.

$?$

$$

Value

$w=$

Units

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Part Brarr

$$

$?$

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