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A freight elevator in the Burj Khalifa tower in Dubai is lifted from rest by a...

A freight elevator in the Burj Khalifa tower in Dubai is lifted from rest by a cable and accelerated to its maximum climb speed in a distance of 3.00 m and within a time interval of 1.73 s. Assume this "lift-off" phase is at constant acceleration.

a) If the average power associated with the tension in the cable is 82.0 kW during the acceleration phase, what is the magnitude of the tension in the cable during this phase?

b) What is the instantaneous power (in kilowatts) associated with the tension in the cable at the moment the elevator has reached its maximum speed?

c) What is the mass of the elevator and its contents?

Science   Advanced-Physics   
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