1. The problem statement, all variables and given/known data With an initial speed of 5.00 m/s a 1.00 kg disk is slid on a horizontal steel plate. How long will it take for the disk to stop, and how far does it travel? ( do not neglect friction ) 2. Relevant equations I don't know how to use the mass in any equations. help. 3. The attempt at a solution something with xo= vo + 1/2at^2 ?? how is the mass used?