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23 Nov 2019
(a) A block with a mass m is pulled along a horizontal surfacefor a distance x by a constant force F at an angle ? with respectto the horizontal. The coefficient of kinetic friction betweenblock and table is µk. Is the force exerted by friction equal toµkmg? If not, what is the force exerted by friction? (b) How muchwork is done by the friction force and by F ? (Donât forget thesigns.) (c) Identify all the forces that do no work on the block.(d) Let m = 2.00 kg, x = 4.00 m, θ= 37.0°, F = 15.0 N, and µk= 0.400, and find the answers to parts (a) and (b).
(a) A block with a mass m is pulled along a horizontal surfacefor a distance x by a constant force F at an angle ? with respectto the horizontal. The coefficient of kinetic friction betweenblock and table is µk. Is the force exerted by friction equal toµkmg? If not, what is the force exerted by friction? (b) How muchwork is done by the friction force and by F ? (Donât forget thesigns.) (c) Identify all the forces that do no work on the block.(d) Let m = 2.00 kg, x = 4.00 m, θ= 37.0°, F = 15.0 N, and µk= 0.400, and find the answers to parts (a) and (b).
Elin HesselLv2
20 Feb 2019
