P150_ExamF_F06sol - Physics 150 1 2 3 4 5 6 7 8 9 10 11 12...

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Answer = E 35. Answer = A 15. Answer = B 34. Answer = E 14. Answer = D 33. Answer = A 13. Answer = E 32. Answer = E 12. Answer = E 31. Answer = C 11. Answer = A 40. Answer = E 20. Answer = E 39. Answer = D 19. Answer = D 38. Answer = B 18. Answer = C 37. Answer = D 17. Answer = B 36. Answer = D 16. 25. Answer = E 5. Answer = B 24. Answer = E 4. Answer = B 23. Answer = C 3. Answer = C 22. Answer = C 2. Answer = D 21. Answer = C 1. Physics 150 Final Exam Solution 12/15/06 Answer = B 30. Answer = A 10. Answer = E 29. Answer = D 9. Answer = C 28. Answer = E 8. Answer = D 27. Answer = D 7. Answer = D 26. Answer = C 6. Answer = D
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Only the force of static friction exerts a torque on the wheel about the center of mass axis. τ cm r wheel F friction := τ cm 6N m = Newton's second law for rotations, τ = I* α , yields: I cm τ cm α := I cm 1.2kgm 2 = C) At the contact point the only torque is produced by the applied force: τ P r wheel F app := τ P 10N m = I P τ P α := I P 2kgm 2 = D) The top of the wheel is a distance 2*r wheel from the contact point. a top 2r wheel α := a top 4 msec -2 = Physics 150 Final Exam Solution 12/15/06 Problem #1: F app 25 N := m wheel 5kg := r wheel 0.4 m := a cm 2.0 m sec 2 := A) The force of static friction opposes the motion.
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P150_ExamF_F06sol - Physics 150 1 2 3 4 5 6 7 8 9 10 11 12...

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