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Q1. A hammer of mass 1.5 kg moves vertically downwards with a velocity of 10 m/s to drive a steel pin of mass 40 grams into a horizontal floor to a depth of 28 mm.

Calculate EACH of the following:

(a) The common velocity of the hammer and pin immediately after impact;

(b) The percentage reduction of energy at impact;

(c) The average resisting force offered by the floor.