(a) A block with a mass m is pulled along a horizontal surface for a distance x by a constant force F( at an angle θ 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? (b) How much work is done by the friction force and by F(? (Don’t forget the signs.) (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).