1. The problem statement, all variables and given/known data A 15.0 kg block is sliding across the floor. Initially, it is moving at 1.2 m/s. However, after sliding 20.0 meters, =7.5 J of work are done on it by friction. What is the block's velocity after sliding 20.0 meters? 2. Relevant equations KE=.5v2 lw-l=F[tex]\Delta[/tex]Xcos[tex]\theta[/tex] w+=F[tex]\Delta[/tex]Xcos[tex]\theta[/tex] 3. The attempt at a solution I found the initial KE to be 10.8 J. I found the ending IE to be -7.5 J and the KE to be 3.3 J. With a velocity of 0.66 m/s as the answer, is this correct? Thanks!