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Unformatted text preview: PHYSICS 002C MIDTERM EXAM May 1, 2009 Q1: A mass m is hooked onto the free end of a suspended coil spring and allowed to come to rest after stretching the spring a distance x= 0.4 m. At this position the spring constant k times x is equal to mg , where the acceleration of gravity is g =10 m/s 2 . The mass is then given a push and it starts moving up and down. What is the angular frequency of this oscillation m k / in units of s-1 ? a) 0.1; b) 2.0; c) 5.0; d) 10; e) 1 . 0 Q2: A violin string with mass per unit length = 1 g/m is stretched between two fixed points a distance of 0.4 m apart. The tension in the string is T = 10 N. What is the fundamental frequency of the string in Hz, given that the velocity of waves in a string is / T v ? a) 198; b) 125; c) 150; d) 131; e) 157. Q3: A violin string is stretched between the nut and the bridge, which are two fixed points on the violin a distance of 0.35 m apart. The fundamental frequency of the string is 440 Hz. What is the fundamental frequency of the string (in Hz) when a apart....
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