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Unformatted text preview: EM-306 Test 1
M. E. Mear 6/25/09 Problem 1
Calculate the tension T in the cable which supports the 1000-lb load with the pulley arrangement shown. Each pulley is free to rotate about its bearing, and the weights of all
parts are small compared with the load. Also ﬁnd the magnitude of the total force on the bearing of pulley C. Problem 2 ‘ The pin A, which connects the ZOO-kg steel beam (with center of gravity at G) to the
vertical column, is welded both to the beam and to the column. To test the weld, the 80-
kg man loads the beam by exerting a 300—N force on the rope which passed through a
hole in the beam as shown. Calculate the torque (couple) M supported by the pin. Problem 3 The uniform panel door weighs 60 lb and is prevented from opening by the strut C, which
is a light two-force member whose upper end is secured under the door knob and whose
lower end is attached to a rubber cup which does not slip on the ﬂoor. Neither of the two
hinges exert couples on the door, and only hinge B can support force in the vertical 2-
direction. ‘ A horizontal force P = 50 1b is applied normal to the plane of the door as shown.
Calculate the compression C in the strut. Also calculate the‘ (horizontal) components of the force supported by hinge A. \ P\’ir(_ n Problem 4
(3) Determine the axial force in members PM and ML. (b) Determine the axial force in
member PK. 1
“J 9 ...
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This note was uploaded on 01/27/2012 for the course E M 306 taught by Professor Rodin during the Spring '08 term at University of Texas at Austin.
- Spring '08