Chapter 5, Problem 2P

(13%) Problem 5: A shop sign weighing m;g hangs from one end of a uniform beam weighing mpg. A hinge attaches the other end of the beam to a wall. The beam has a length of l1. A cable is attached to the beam a distance l2 from the hinge to help support the beam. The cable makes an angle 0 with the beam as shown. e 4 Paul's o o. Auto Repair E A 13% Part (a) On the following free body diagram, draw all of the forces acting on the beam, representing the forces as vectors. Use a coordinate systen with the x-axis on the horizontal (along the length of the beam) and the y-axis vertical (perpendicular to the beam). Use "wb" for the weight of the beam, "ws" for the weight of the sign, "FT" for the force of tension, and "H" for the force on the hinge. Finally, since we don't know the angle that the force on the hinge will act based on the diagram alone, let it be acting at an angle be denoted "o" from the positive y-axis. I A 13% Part (b) Using the free body diagram from part (a), write an…

Write the relations used to find the forces in compound bars made of two materials subjected to tension.

The following data is refers to a screw jack. The vertical load on the screw320kN Force applied at the lever end whose length=80cm The mean radius of the screw=2.5cm Pitch of the screw=1cm Co-efficient of friction between the screw thread and the nut=0.15 Determine the force on the lever end while raising the load and efficiency of the screw jack