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Unformatted text preview: THE UNIVERSITY OF BRITISH COLUMBIA 2009/2010 WINTER SESSION Physics 170 Mechanics I Mid Term Exam 7:30-8:30 PM, Wednesday, February 10, 2010 Please write your name, student number, course Section number and Tutorial Section number on the exam answer booklet which is provided. Write all work to be marked in the answer booklet. This is a closed book exam. You are allowed to use writing and drawing instruments, a calculator (without internet connection ca- pability) and an 8 1 2 × 11-inch handwritten, double sided formula sheet with no mechanical printing or reduction. You must hand in BOTH your formula sheet and your Answer Booklet in order for your exam to be marked. The exam consists of two questions. Please attempt both of them. The two questions are weighted equally. Within each question, marks are given as indicated. over → 1 1. The forces and couple moments that are exerted on the toe and heel plates of a snow ski are vector F t = (- 50 ˆ i + 80 ˆ j- 158 ˆ k ) N , vector M t = (- 6 ˆ i + 4 ˆ j + 2 ˆ k ) Nm , vector F h = (- 20 ˆ i + 60 ˆ j- 250 ˆ k ) N , vector M h = (- 20 ˆ i + 8 ˆ j + 3 ˆ k ) Nm , respectively....
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