1. The problem statement, all variables and given/known data A pizza box thrown across the room strikes the floor with a horizontal velocity of 2.0 m/s. 2. Relevant equations If the 300-g box encounters a floor with a coefficient of kinetic friction of 0.3, how far will the box slide before coming to rest? 3. The attempt at a solution So I did it by using the equation a=ug(u is coefficient of kinetic friction), and I got -2.94 m/s^2 as the acceleration. Then, I used a kinematics equation and found d to be 0.68 m, but the answer says its 0.068 m. Is the answer at the back wrong? Also, I was wondering if the given 300g mass of the box was needed in the solution?