1.

A boy weighing 350 N climbs up 20.esteps each door high in 1 minute.calculate :- (1 the work done2) the pouler spent-

Answer»

Weight = 350 NHeight = height of one step x no. of steps = 0.2 x 30 = 6 mWork done = P.E = mghWork done = 350 x 6 = 2100 JPower = Work done/Time = 2100/60 [ 1 min = 60 sec.] = 35 W



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