When in use, the motor and flywheel of a punch press run continuously. A compressed-air-actuated, multiple-disk clutch connects the flywheel to the countershaft each time the press is to punch or form metal. The clutch torque required is 600 N m. Alternate sintered metal and cast-iron disks are to be used. For design purposes it is decided to use 75 percent of the average value of f, and one-third of the average value of p given in Table 18.1. In addition, a safety factor of 1.20 is to be used with respect to torque capacity. Space requirements limit the disk outside diameter to 250 mm. (a) Determine the minimum satisfactory total number of disks. (b) Using this number of disks, determine the minimum area of com- bod pressed-air actuating surface that must be provided if air will always be available at a pressure of at least 0.40 MPa. Ans. Part a.) (2 Sintered Metal Friction disks and 3 Cast Iron Plates) Note: The number of friction surface interfaces: N = 4. Part b.) Area = 0.02029 m²

1. Angle of the complex number below in radians is: : -0.2t (cost + isin t) where t = t 2. Real and imaginary part of the previous question is: 3. Conjugate of that is:

45° AZ. 4.4.1 Solve for d1, 02, 03 using the geometric method:

4m ABC is a wall crane. The weight W is hung on pulley and cable as shown. Suppose the weight W is 8 kN. 40 Determine: A a) The cable tension F F b) The force at beam AC (beam 1) c) The force at beam BC (beam 2) Neglect the weight of the pulleys. Cable rooo Draw the FBD Analytical Solution. 2 Decimal numbers is sufficient. Draw your FBD

solve, show all steps for given solution.