Physics pre lab 1,2,3

Lab 4: Pre-Lab Questions (15 pts.) 1. A friction tray on a horizontal surface is connected to a hanging mass. The mass of the tray is my = 8.0 kg, the hanging mass is my = 5.0 kg, and uk = 0.34. Using the force equations for the tray and the hanging mass given in the Background section, compute the acceleration of the system. (5 pts.) 2. A friction tray on a horizontal surface is connected to a hanging mass. The mass of the tray is me = 3.2 kg, and the hanging mass is my = 1.4 kg. When the system is released from rest, the measured acceleration is a = 0.45 m/s'. Compute /k. (5 pts.) 3. A 0.4-kg object is placed at rest on a track, and the track is slowly inclined. Given that As = 0.6, at what angle of inclination does the object start to slip? (5 pts.) 42