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Q1. The elevators at Burj Khalifa in Dubai are able to move with a constant velocity...

Q1. The elevators at Burj Khalifa in Dubai are able to move with a constant velocity of 40 km/hr and are able to lift up to 2000 kg from ground level to the top floor which is 800 meters above the ground. Calculate the power required by the elevator motors to do this. *

Q2. At a show during the Muscat festival a showman who has a mass of 80 kg, jumps from a height of 12 meters onto a trampoline which is supported by a spring 3 meters above the ground as shown in the figure below. What is the minimum height reached above the ground if the spring constant is k=6660 N/m? *

Science   Advanced-Physics   
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