Skill D1.   Consider this board production line that has the…

Skill D1.   Consider this board production line that has the following characteristics.  Parts arrive at a rate of 36 boards per hour, and the SCV of the interarrival times = 1.  The processing times are per board.  What is the minimum number of machines needed at each workstation?                                                                Number of          Mean process               Process time                          Workstation                   machines           time (minutes)                    SCV                              MMOD                             ?                          1.43                                4                                 SIP                                ?                          2.12                                4

QUESTION 4 Cart A with a mass of 1 200 kg is towing cart…

QUESTION 4 Cart A with a mass of 1 200 kg is towing cart B also with a mass of 1 200 kg with a tow rope as shown on the diagram below. They are moving across a rough horizontal surface, with a force of magnitude F. Ignore the mass of the rope. The coefficient of kinetic friction for the cart A and cart B, are 0,2 and 0,1 respectively. Right click on the button below to open the image in a new tab.   4.1 State Newton’s second law in words. (2) 4.2 Draw a free body diagram of all the forces acting on cart A. (5) 4.3 Calculate the tension in the string if the system accelerates to the right at 4 m.s-2.               (5) 4.4 Calculate the magnitude of the force F if the system moves to the right at constant velocity. (6)     [18]