Homework Help: Physics

Posted by Elle on Saturday, October 27, 2007 at 10:27pm.

The cable of an elevator of mass M = 1020 kg snaps when the elevator is at rest at one of the floors of a skyscraper. At this point the elevator is a distance d = 18.4 m above a cushioning spring whose spring constant is k = 6500 N/m. A safety device clamps the elevator against the guide rails so that a constant frictional force of f = 6678 N opposes the motion of the elevator. Find the maximum distance by which the cushioning spring will be compressed.

This is what I did but the answer was wrong!:
Wtotal = (mg- f) 18.4m
Wtotal = 1/2 kx^2

Physics - Quidditch, Saturday, October 27, 2007 at 10:50pm
I just replied to the previous post. The roots I got for the quadratic were +4.875 and -3.854,
Physics - Elle, Saturday, October 27, 2007 at 10:52pm
Ah, it's right. Thanks alot!

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