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P. 3836. From a 5 m high hill a 6 kg sleigh slides down, and stops somewhere on the horizontal ground. Find the work done while the sleigh is pulled back from this position to the top of the hill.

(4 points)

Deadline expired on 12 December 2005.

Statistics on problem P. 3836. 286 students sent a solution. 4 points:237 students. 3 points:3 students. 2 points:4 students. 1 point:41 students. Unfair, not evaluated:1 solution.