Answer Happy

Part A. Please choose the forest Citych Make sure that only ONE of the alternatives is chosen for each que te will result in loss of the mark of that question 1. Ir the only forces acting on 20-a particle wr-St-DN1- magnitude of the acceleration of the partie A. 4.7 m/s B.3.2 m C. 5.6 m/s D. 7.2 m/ E. 9.4 m/s 2. A 3.0 kg block is pulled over a rough horizontal surface by a constant force of 6N of 37° above the horizontal as shown. The speed of the block inerents from 40 displacement of 4.7 m. What work was done by the friction force during this displ A. -30J B. 47J C. -64 J D. +64 ) E. -94 J 3. A block with 1.2-kg mass sliding on a rough horizontal surface is attached spring (k = 200 N/m) which has its other end fixed. If this system is disp from the equilibrium position and released from rest, the block first reache with a speed of 2.4 m/s. What is the coefficient of kinetic friction between surface on which it slides? A. 0.13 B. 0.23 C. 0.34 D. 0.44 E. 0.68 4. A 1.2-kg object moving with a speed of 8.0 m/s collides perpendi with a speed of 6.0 m/s in the opposite direction. If the object is i what is the magnitude of the average force on the object by the w A. 1.2 KN B. 5.6 kN C. 7.7 kN D. 8.4 KN E. 9.8 KN PHYS 191-L55-11

3. A block with 1.2-kg mass sliding on a rough horizontal surface is attached to spring (k = 200 N/m) which has its other end fixed. If this system is disp from the equilibrium position and released from rest, the block first reache with a speed of 2.4 m/s. What is the coefficient of kinetic friction between surface on which it slides? A. 0.13 B. 0.23 C. 0.34 D. 0.44 E. 0.68