Recent content by lovechild

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    What is the power of the engine in a moving elevator?

    Homework Statement 1.Lets look at the motion of a lift in two situations:a) The lift moves upward with a constant speed of 2m/s.how much electrical power goes the engine of the llift use if the efficiency of the engine is 90% ? b) Whats the power at time 1.5s when the lift started upwards...