A block with a mass m is pulled along a horizontal surface for a distance x by a constant force at an angle ? with respect to the horizontal. The coefficient of kinetic friction between block and table is μk. Is the force exerted by friction equal to μkmg? If not, what is the force exerted by friction? (Assume ? is measured above the horizontal.) This answer has not been graded yet.
(a) A block with a mass m is pulled along a horizontal surface for a distance x by a constant force at an angle ? with respect to the horizontal. The coefficient of kinetic friction between block and table is μk. Is the force exerted by friction equal to μkmg? If not, what is the force exerted by friction? (Assume ? is measured above the horizontal.)
This answer has not been graded yet.
(b) How much work is done by the
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(c) Identify all the forces that do no work on the block. (Select all that apply.)
(d) Let m = 2.00 kg, x = 4.40 m, ? = 3.2°, F = 15.5 N, and μk = 0.400, and find the answers to parts (a) and (b). (Include appropriate signs.)
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| WF | = | J |
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