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## Homework Statement

A total work of 250 J is done as a guy pulls a box from the ground up to the attic, 10.0 m above the ground. What is the mass of the box?

W=250J

h=10.0m

g=9.81m/s^2

m=?

## Homework Equations

W=m*g*h

## The Attempt at a Solution

m=[itex]\frac{g*h}{W}[/itex]=[itex]\frac{10*9.81}{250}[/itex]=2.55kg