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5/30 MCQs for:
MECHANICS : ENERGY - Power
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 unit of power in the International System (SI)?
How much work is done if 500 J of energy is transferred by a machine in 10 seconds?
A machine provides 600 J of useful work in 2 minutes. What is the power output of the machine in watts?
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?