# Work and Mass

1. Oct 6, 2013

### woaini

1. The problem statement, all variables and given/known data

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=?

2. Relevant equations

W=m*g*h

3. The attempt at a solution

m=$\frac{g*h}{W}$=$\frac{10*9.81}{250}$=2.55kg

2. Oct 7, 2013

### NihalSh

check the equation you have written, although the answer is right.

since W=m*g*h
that means m=$\frac{W}{g*h}$