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PHYS_111_Hill_m87rich_Exam_3_Fall_2006

# PHYS_111_Hill_m87rich_Exam_3_Fall_2006 - PHYSICS 111 EXAM 3...

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PHYSICS 11 1 EXAM 3 FALL 2006 In all problems please ignore the effects of friction. 37. What must be the mathematical form of the force needed to produce simple harmonic motion? Hint: k is a constant 38. A point mass of 5.0 kg vibrates on the end of a horizontal massless spring between points A. and B. as shown in the figure to the right. The spring constant is 90 Nlm. What is the speed of the mass 0.20 m from the equilibrium point? (a) 1.1 mls m ( c ) 2.6 rnls (d) 3.4 rnls (e) 4.2 mls 39. A sound wave traveling in air in the x direction at room temperature is described by x = 40. cos (20. t). What is the wavelength of this sound wave. (a) 20 m (b) 40 m (c) 65 m (d) 82 rn633 40. Which waves are purely longitudinal? 0 sound waves in air (b) infra red waves in air from the sun (c) light waves in a vacuum (d) waves on a plucked guitar string (e) surface waves in a shallow pan of water

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PHYS_111_Hill_m87rich_Exam_3_Fall_2006 - PHYSICS 111 EXAM 3...

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