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(a) An orange crate of mass M is at rest on an icy surface. One cord connects the crate to a wall. A second cord oases over a frictionless rod and suspends another crate of equal mass. What is the tension in each cord?

(b) If the cord between the orange crate and the wall is replaced by a spring with spring constant k and unstressed length l, obtain how far is the orange crate from the wall?

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