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5/30 MCQs for:
MECHANICS : ENERGY - Power
A machine provides 600 J of useful work in 2 minutes. What is the power output of the machine in watts?
What is the power of a motor that lifts a 10 kg object a height of 5 meters in 10 seconds? (Use g = 9.8m/s²) :
How much work is done if 500 J of energy is transferred by a machine in 10 seconds?
A motor lifts a 200 kg load vertically at a constant speed. If the motor exerts a force of 2000 N, what is the power required to lift the load at a speed of 2 m/s?
What is the average power developed by a person who runs 10 meters in 2 seconds, exerting a force of 100 N?