1. The problem statement, all variables and given/known data 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. 2. Relevant equations work= umgxsin[tex]\vartheta[/tex] f=uF 3. The attempt at a solution I dont understand how I am supposed to find the coefficient of friction without knowing what the mass is.