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Problem P. 4055. (March 2008)

P. 4055. One end of a long, thin elastic sheet of negligible mass is attached to the rim of a horizontal table, and a 3-kg object is fixed to its other end. At the equilibrium position the end of the sheet descends by 6 cm below the horizontal. Then the object is raised by 4 cm above the horizontal.

How much work is done while the object is raised?

(4 pont)

Deadline expired on 11 April 2008.


120 students sent a solution.
4 points:79 students.
3 points:1 student.
2 points:7 students.
1 point:13 students.
0 point:18 students.
Unfair, not evaluated:2 solutions.

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