An elastic cord is stretched between two points A and B,
Chapter 13, Problem 13.61(choose chapter or problem)
An elastic cord is stretched between two points A and B, located 800 mm apart in the same horizontal plane. When stretched directly between A and B, the tension is 40 N. The cord is then stretched as shown until its midpoint C has moved through 300 mm to \(C^{\prime}\); a force of 240 N is required to hold the cord at \(C^{\prime}\). A 0.1-kg pellet is placed at \(C^{\prime}\), and the cord is released. Determine the speed of the pellet as it passes through C.
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