18. Waves & Sound
Standing Waves
18. Waves & Sound Standing Waves
29PRACTICE PROBLEM
A horizontal rope is attached to a 70.0-Hz mechanical shaker with a small amplitude. The rope has a mass per unit length of 3.0×10−4 mkg. It extends over a fixed support located 1.75 m from the shaker, and a mass is attached to the rope's free end, as illustrated below. What mass m should be suspended from this end to form 7 loops of a standing wave? Assume the end at the shaker is a node.
A horizontal rope is attached to a 70.0-Hz mechanical shaker with a small amplitude. The rope has a mass per unit length of 3.0×10−4 mkg. It extends over a fixed support located 1.75 m from the shaker, and a mass is attached to the rope's free end, as illustrated below. What mass m should be suspended from this end to form 7 loops of a standing wave? Assume the end at the shaker is a node.