In the figure below, a cord is attached to an oscillator and wrapped around a li
ID: 2283461 • Letter: I
Question
In the figure below, a cord is attached to an oscillator and wrapped around a light pully where it is attached to a block with a mass, m = 4.0 kg. The length of the cord between point P and the pulley is L = 1.5 m.
(a) When the vibrator is set to a frequency of 155 Hz, a standing wave with six loops is formed. What must be the linear mass density of the cord?
__________kg/m
(b) How many loops (if any) will result if m is changed to 5.76 kg?
_______loops
(c) How many loops (if any) will result if m is changed to 9.00 kg?
_______loops
Explanation / Answer
(a) When the vibrator is set to a frequency of 155 Hz, a standing wave with six loops is formed. What must be the linear mass density of the cord?
_____129.5_____kg/m
(b) How many loops (if any) will result if m is changed to 5.76 kg?
____6.5___loops
(c) How many loops (if any) will result if m is changed to 9.00 kg?
____12.3___loops