1 Springs A 25.0 cm spring stands vertically on the ground, with its lower end secured in a base. A 1.5 Kg brick is held 40 cm directly above the spring and dropped onto the spring. The spring compresses to a length of 17.0 cm before starting to launch the brick back upward. Problem 1.4. What is the work done by the spring? Problem 1.5. What is the spring’s spring constant?

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