PHYSICS midterm exam 4

PHYSICS midterm exam 4 - Oregon State University Physics...

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Oregon State University Physics 201 Midterm Exam #4 Fall Term, l 2008 Form A General directions : Only one sheet of paper (8.5” x 11”—both sides), with only handwritten notes, may be used during this exam. You may use any kind of calculator, provided that it is not part of a PDA, cell phone, palmtop or laptop—and that it is not transmitting any information wirelessly. Physical constants and other possibly useful information are provided here. Answer Question #1 f rst. Physical constants and other possibly useful information: g earth.surface = 9.80 m/s 2 m earth = 5.98 x 10 24 kg G = 6.67 x 10 -11 N·m 2 /kg 2 Question #1: What is the Form designation (A, B, C, D, E, F or X) for your exam—shown at the top of this page? Write this letter in the answer box for Question 1 on the ± rst answer sheet in the exam booklet. For questions 2- 16 : For multiple-choice or true/false items, write the letter of the one best answer in the appropriate box on the answer sheet. For questions requiring short answers (a word or short phrase only), write those in the spaces provided. Youʼre graded on your answers only—no need to show work. Assume 3 signi± cant digits and SI units in all numeric answers unless instructed otherwise. True/False (8 points each) 2. True or false? The SI units of µ S are Newtons (N). F 3. True or false? A body that has zero acceleration is never moving. F 4. True or false? If a 3.00-kg block is lying at rest on a level surface, with a horizontal force of 15.0 N applied to the block, and μ S between the surface and block is 0.80, the static friction force on the block is 23.5 N. F 5. True or false? If a non-zero force that is applied to an object produces zero torque about a certain axis, that forceʼs line of action must pass through that axis. T 6. True or false? If you are standing in an elevator that is moving vertically upward, your apparent weight is always greater than your actual weight. F 7. True or false? The center of mass in an object is the point where all of its mass is actually located. F
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PHYSICS midterm exam 4 - Oregon State University Physics...

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