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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 person lifts a 50 kg weight vertically by 2 meters in 10 seconds. What is the power exerted by the person? (Use g = 10m/s²) :
What is the average power developed by a person running up a flight of stairs that requires 1200 J of energy and takes 10 seconds?
If a 100 W light bulb is used for 5 hours, how much energy does it consume?
What is the relationship between work, power, and time?