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5/30 MCQs for:
MECHANICS : ENERGY - Power
What is the typical power output of a human during strenuous exercise?
Which of the following is the best way to express the efficiency of a power-producing system?
A person runs upstairs with a constant power output of 200 W. If the total work done to reach the top is 1000 J, how long does it take the person to reach the top?
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) :
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?