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Question 1 : A petrol engine has a work output of 96kJ per minute. What is the power I put if the engine efficiency is 20%? Question 2 : A crane lifts a load of 500kg to a height of 120m in 16s. If the power input is 45 000W, what is the efficiency of the motor used in the crane?
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Question 1 : A petrol engine has a work output of 96kJ per minute. What is the power I put if the en...
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