Solution Midterm Exam 2006 pdf

Solution Midterm - MECHANICAL AEROSPACE ENGINEERING DEPARTMENT UNIVERSITY OF CALIFORNIA LOS ANGELES MAE 101 STATICS AND STRENGTH OF MATERIALS Fall

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MECHANICAL & AEROSPACE ENGINEERING DEPARTMENT UNIVERSITY OF CALIFORNIA, LOS ANGELES MAE 101 STATICS AND STRENGTH OF MATERIALS Fall, 2006 INSTRUCTOR CHATTERJEE, A. K. MIDTERM EXAMINATION November 13, 2006 INSTRUCTIONS: SHOW ALL CALCULATIONS ON THESE PAGES. ATTACH ADDITIONAL PAGES AS NECESSARY. NAME ______S O L U T I O N________________________________________ Student ID ____________________________________
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MAE-101: Solution to Midterm Examination: Fall, 2006: Chatterjee, A., Page 2 of 8 Problem 1 (4+4+7) 1. Explain the concept of a free-body diagram (FBD). Why is a FBD important in solving problems of mechanical engineering? 2. Draw the FBD of the beam 3. Determine the reaction at the support B Note : Reaction at B is normal to the inclined plane Solution: 1. A free-body diagram (FBD) of a selected body shows the selected body with all forces acting on the body including the applied forces, reactions at all supports and connections that are physically in contact with the selected body. Reactions at supports or connections internal to the body can be excluded. Under the applications of the forces shown in the FBD, the selected body should be free to move . 2. For solving problems of mechanical engineering, recall that Newtonian laws of mechanics (first, second and third laws of motions) are only applicable to the forces shown in a complete FBD for a selected body. A correct drawing of FBD is important since the equations of equilibrium can only be derived from a correctly drawn FBD. If a FBD is incorrect or incomplete, resulting equations of equilibrium (or motion for dynamic problems) will be incorrect leading to incorrect solution to the problem.
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This note was uploaded on 03/08/2008 for the course MAE MAE 101 taught by Professor Chartejee during the Spring '08 term at UCLA.

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Solution Midterm - MECHANICAL AEROSPACE ENGINEERING DEPARTMENT UNIVERSITY OF CALIFORNIA LOS ANGELES MAE 101 STATICS AND STRENGTH OF MATERIALS Fall

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