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Q1. A light cord passing over a light, smooth pulley has masses of 2 kg and 4 kg respectively attached to its ends. The pulley has a diameter of 300 mm. The 4 kg mass is held 3 m above ground level, with tension in the cord, and then released. Calculate EACH of the following:

(a) The time taken for the 4 kg mass to reach ground level;

(b) The time the cord remains slack after the 4 kg mass reaches ground level if the 4 kg mass does not bounce.