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And third, post HW problems in one of the HW forums. The Mechanical Engineering forum is not the place for HW problems.Please read the forum rules.
First, bumping a thread is against the rules unless you wait 24 hours
Second, you have to show some effort on your own before you'll get any help here. This forum is about helping people figure out how to solve problems, not about giving them answers. If you don't show your own work, no one can know where you are having a problem.