An engine develops 10kw of power. how much time will it take to lift a mass of 200kg to a height 40m.
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Work to be done against gravity= 200×10×40
Power = 10000W
Power = Work/Time
10000=80000/Time
Time = 8s
Power = 10000W
Power = Work/Time
10000=80000/Time
Time = 8s
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