All Exam Questions 1 for Mechanics | PHYS 131, Exams of Mechanics

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NAME, Physics 131-01 Hour Exam I February 23, 2009. You must work these problems starting from basic definitions or from the equations on the equation sheet. Answers with- out any justification, explanation, or organized mathematical work will not be accepted. Vectors are to be specified either by listing components individually, by using the i,j. & notation, or by using another component oriented notation. Be clear and concise in your answers, Please draw a box around numerical answers. Partial credit can be given for work only if it can be understood. All answers must have the correct units. If any question is unclear, please ask immedi- ately. If you get stuck on the math at any point, be sure to indicate clearly the physics you are using and how you would contin- ue if you could do the math. If you need a result from a previous part that you could not find, define a new symbol for this result (i.e. let ay represent the acceleration from the previous part) and work out the result with this new symbo}. Prob 1 (15 pts): Consider a particle which is moving along a curving path with changing speed. Describe the relations be- tween the radial and tangential parts of the acceleration to the motion of the particle, Be sure to address both the orientation of these vectors and their magnitude, Use a carefully drawn sketch to illustrate your explanations.