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Grade 11 physics questions.?

Grade 11 physics questions.?

Answer:

output energy mgh 4000x9.8x10 392000 joules power 392000 joules / 20s 19600 watts or 19.6 kW efficiency 19.6/50 39% assuming tonnes are metric tons4 tonnes 4000 kg .
output energy mgh 4000x9.8x10 392000 joules power 392000 joules / 20s 19600 watts or 19.6 kW efficiency 19.6/50 39% assuming tonnes are metric tons4 tonnes 4000 kg .

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