1.

A horse pulls a trolley with a force 100N at an angle of 60degree from horizontal how much work done by the horse in a min if he moves with speed of 18 Km per hours

Answer»

18km/hr. =18 × 5/18 mt/sec =5 mt/sectime = 1 min. =60 sec.distance = speed × time s = 5 × 60 = 300 mt.work done = Fscos60° =100 × 300 × 1/2 =15000m =15 km



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