# Trying to find how much work is done by friction

## Homework Statement

A man drags a table 4.05 m across the floor, exerting a constant force of 51.0 N, directed 25.0° above the horizontal.

How much work is done by friction? Assume the table's velocity is constant.

## Homework Equations

work= umgxsin$$\vartheta$$
f=uF

## The Attempt at a Solution

I dont understand how I am supposed to find the coefficient of friction without knowing what the mass is.