## Determine the static safety factor if the spring is subjected to a static load of 175 N.

1.       Three springs are arranged in parallel like the configuration shown in Figure 3-1(b). They have spring rates k1 = 50 N/mm, k2= 150 N/mm, and k= 500 N/mm, respectively. Determine the total spring rate, the force carried by each spring, and the overall deflection if a load of = 600 N is applied.

2.       A spring made from ASTM A228 wire with ends squared and ground, wire diameter = 3 mm, outside diameter D= 27 mm, 14 total coils, and free length Lf = 80 mm has been chosen for an application. Determine the static safety factor if the spring is subjected to a static load of 175 N.

### design suitable bearings to support the load for at least 5E8 cycles at 1 200 rpm using deepgroove ball bearings.

The shaft shown in Figure P11-4 was designed in Problem 10-19. For the data in row (a) of Table P11-1, and the corresponding diameter of shaft found in Problem 10-19,….

### Find the minimum film thickness for a long bearing with the following data: 30-mm dia, 130 mm long, 0.0015 clearance ratio, 1 500 rpm, ISO VG 100 oil at 200°F, and supporting a load of 7 kN.

1.       A paper machine processes rolls of paper having a density of 984 kg/m3. The paper roll is 1.50-m OD X 22-cm ID X 3.23-m long and is on a simply supported, 22-cm OD, steel….

### Find the minimum film thickness for a bearing with these data: 30-mm dia, 25 mm long, 0.0015 clearance ratio, 1 500 rpm, ON = 30, ISO VG 220 oil at 200°F.

1.       Problem 7-12 estimated the volume of adhesive wear to expect from a steel shaft of 40 mm dia rotating at 250 rpm for 10 years in a plain bronze….