Q1/ In the equilibrium position shown in figure below, the uniform bar (AB) has a mass of (50 kg) and supports load (200 kg) at (A). Determine the tension (T) in the cable and reaction force at (B)?

The figure shown below (Fig. 2) is a schematic representation of a scissor jack in two different positions. The maximum load that this mechanism must withstand is 800 kg. 4 are proposed different materials to make the jack arms and spindle. The mechanical properties and some Physical characteristics of each material are shown in Table 1. a) Based on the properties of each material and the cross section of the arms and the screw, Propose what would be the most suitable material for its manufacture. The length of each arm is 150 mm. The stress on the arms and the spindle must not exceed the yield strength of the material selected for neither of the two analysis positions. b) Using the mechanical properties of the material you selected, calculate the change in dimension that the arms and the spindle of the jack were tested for the two analysis positions. The length of the spindle is 280 mm.

A hydraulic press for compacting powdered PRACTICE samples has a large cylinder which is 10.0 cm in diameter, and a small cylinder with a diameter of 2.0 cm (Fig. 9). The piston of the small cylinder is attached to the midpoint of a lever that is hinged at point C as shown in the figure. The sample, which is placed on the large cylinder, has an area of 4.0 cm?. What is the pressure on the sample if 350 N is applied at the end of the lever? (Giancoli, 2014) F2 350 N Sample- F Hydraulic. fluid 10.0 cm Small cylinder -2.0 cm