s 8-9 refer to the figure shown below. A force ???? = 20 ???? is applied on a block of mass ????1 = 3 ????????. ????1 is in contact with a block of mass ????2 = 2 ????????. There is no friction between ????1 and the ground and there is also no friction between ????2 and the ground. ????1 and ????2 move together to the right with an acceleration ????. Problem 8: What is the acceleration of the system? a. 2.0 m/sec2 b. 4.0 m/sec2 c. 6.0 m/sec2 d. 8.0 m/sec2 Problem 9: What is the contact force between ????1 and ????2? a. 8.0 N b. 18.0 N c. 28.0 N d. 38.0 N Problems 10-12 refer to the following figure. A mass of 2 kg is attached to one end of a rope 1.5 m long. The rope is swung in a vertical circle with a uniform speed of 4.5 m/sec.

Problems 8-9 refer to the figure shown below. A force F = 20 N is applied on a block of mass m1 = 3 kg. m, is in contact with a block of mass m2 = 2 kg. There is no friction between m, and the ground and there is also no friction between my and the ground. m, and m2 move together to the right with an acceleration a. a m1 m2