28. In the arrangement shown in Figure P18.27, an object M of mass m = 5.00 kg hangs from a cord around a light pulley. The length of the cord between point P and the pulley is L = 2.00 m. (a) When the vibrator is set to a frequency of 150 Hz, a standing wave with six loops is formed. What must be the linear mass density of the cord? (b) How many loops (if any) will result if m is changed to 45.0 kg? (c) How many loops (if any) will result if m is changed to 10.0 kg?
28. In the arrangement shown in Figure P18.27, an object M of mass m = 5.00 kg hangs from a cord around a light pulley. The length of the cord between point P and the pulley is L = 2.00 m. (a) When the vibrator is set to a frequency of 150 Hz, a standing wave with six loops is formed. What must be the linear mass density of the cord? (b) How many loops (if any) will result if m is changed to 45.0 kg? (c) How many loops (if any) will result if m is changed to 10.0 kg?
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Transcribed Image Text:28. In the arrangement shown in Figure P18.27, an object
M of mass m = 5.00 kg hangs from a cord around a light
pulley. The length of the cord between point P and the
pulley is L = 2.00 m. (a) When the vibrator is set to a
frequency of 150 Hz, a standing wave with six loops is
formed. What must be the linear mass density of the
cord? (b) How many loops (if any) will result if m is
changed to 45.0 kg? (c) How many loops (if any) will
result if m is changed to 10.0 kg?
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