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Midterm March 2008

Midterm March 2008 - THE LINIVERSITY OF BRITISH COLUMBIA 2...

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THE LINIVERSITY OF BRITISH COLUMBIA 2OO7 I2OO8 WINTER SESSION PHYSICS 170 MECHANICS I Midterm Examination: 7:30 pm to 8:30 pm, Monday, March 3,2008 Write all work to be marked in the Answer Booklets provided. You may consult one 8 Yz inch by I I inch hand-written double-sided information sheet. You must hand in your information sheet with your Answer Booklet in order for your exam to be marked. You may use a graphing calculator. The exam consists of 2 questions. Question 1 is worth l5 marksand Question 2 is worth 25 marks. The exam counts for a total of 20 marks towards your Final Gradefor the course. OUESTION I The diagram below shows arigid body ABCD. A couplemoment M:10 kkN m acts at A, aforce F s : 2 i k N a c t s a t B , a f o r c e F 6 : 3 j k N a c t s a t C a n d a f o r c e F p : 4 k k N a c t s a t D , w h e r e i , j , k a r e t h e u s u a l Cartesian unit vectors. a) Draw a large, clear diagram for ABCD showing the Cartesian unit vectors and the numerical values of the couple moment, the three forces and the coordinates of points A, B, C and D. (3 marks) Write the resultant Fn of the three forces as a Cartesian vector.
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