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5/30 MCQs for:
MECHANICS : ENERGY - Power
If the power of a machine is 1 kW, how much energy does it consume in 1 hour?
A 2000 W motor is used for 1 hour. How much energy does it consume?
How much work is done if 500 J of energy is transferred by a machine in 10 seconds?
A car engine produces 100 horsepower. How many watts is this equivalent to?
Which of the following is the best way to express the efficiency of a power-producing system?