équilibré débat trimestre porter kg cylindre je pense Abattage
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porter lifts a luggage of 15 kg from the ground and puts it on his head `1.5 m` above the ground... - YouTube
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Porter carrying more than 100 kg heavy load of beer bottles up an ascending track Stock Photo - Alamy
Woodfordes Nog Porter Sytle 3 Kg
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View question - A porter pulls a 10-kg luggage along a level road for 5 m by exerting force of 20N at an angle of 30 degrees with the hrizontal shoulder thr