1.

A horizontal force 10 N is necessary to just hold ablock statioanry against a wall. The coefficient offriction between the block and the wall is 0.2, theweight of the block is -8K.F 10 NWall(A) 20 N(C) 100 N(B) 50 N(D) 2 N

Answer»

horizontal force on body = normal reaction force = 10 N

so frictional force = 10 x 0.2 = 2N which just counteracts the weight of the body therefore weight of the body is also 2N



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