(c) In a diagram below, a 40 kg object is dropped on to a vertical spring from a height h = 2.0 m. The maximum spring compression by the dropping mass is 0.3 m. (Hint: apply conservation of energy) (i) Determine the spring constant k. [3 marks] (ii) Calculate the speed of the object at 0.15 spring compression. [2 marks] решёшь
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