Denver\'s Mile High football stadium incorporates a system by which a section of

Question

Denver's Mile High football stadium incorporates a system by which a section of stands can be moved to accommodate different sports on the field. The grandstand, which has a mass of 4x106 kg, can be moved a distance of 45 m on a thin film of water. The movable grandstand rests on 46 bearing pads that are each 1.22m in diameter. Water at high pressure is pumped into each of the pads until the stands are lifted a vertical distance of 3.8 cm. Excess water forms a lubricating film over which the grandstand is moved. The force required to move the stands is approximately 4.45 N per 450 kg of staduym mass. Calculate the following:

a. The pressure of the water under each bearing pad

b. The power of the motor required to move the grandstands over the distance of 45 m if the job takes 1 h.

c. the work required to raise the grandstand 3.8 cm.

Notes:

Explanation / Answer

The solution to your question is on this link. The numbers might be different but you should use the same formulas and process. http://www.physicsforums.com/showthread.php?p=3710765 Good Luck and Please Rate

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