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(II) One end of a horizontal string of linear density 6.6 × 10−4 kg/m is attached to a small-amplitude mechanical 120-Hz oscillator. The string passes over a pulley, a distance ℓ = 1.50 m away, and weights are hung from this end, Fig. 15-37. What mass m must lie hung from this end of the string to produce (a) one loop, (b) two loops, and (c) five loops of a standing wave? Assume the string at the oscillator is a node, which is nearly true.
FIGURE 15-37
Problem 52 and 53.
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