. Your little sister and her friend build treehouses and stretch a rope between them for
Chapter 14, Problem 83(choose chapter or problem)
. Your little sister and her friend build treehouses and stretch a rope between them for sending messages. They hang a 1.4-kg mass on one end of the rope that passes over a pulley. The other end is tied to the second treehouse. When your sister plucks the rope, a wave propagates at 18 m/s. The girls deem this too slow; they want to increase the wave speed to 30 m/s. Your sister asks, What mass should I use? What do you reply?
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