Assignment:
Question 1. A stationary block explodes into two pieces that slide along a frictionless floor and then into regions with friction, where they stop. The first piece, with a mass of 2.0 kg, encounters a coefficient of kinetic friction of 0.40 and slides to a stop in a distance 0.15 m. The second piece encounters a coefficient of kinetic friction of 0.50 and slides to a stop in a distance of 0.25 m. What was the mass of the block?
Question 2. A block slides along a track from one level to a higher level after passing through an intermediate valley. The track is frictionless until the block reaches the higher level. There a frictional force stops the block in a distance d. The block's initial speed is 6.0 m/s, the height difference between the levels is 1.1 m, and the coefficient of kinetic friction is 0.60. Find d.