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57. A horizontal force 10 N is necessary to just holda block stationary against a wall. The coefficient offriction between the block and the wall is 0.2, theweight of the block isF 10 NWall(1) 20 N(3) 100 N(2) 50 N(4) 2 N |
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Answer» mg=uNm×10=0.2×10m=0.2kgweight=mg=0.2×10=2N |
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