A person pulls a toboggan for a distance of 42.8 m along the snow with a rope directed 26.4° above the 110 N. (a) How much work is done on the toboggan by the tension force? (b) How much work is done if t parallel to the snow? (a) Number i Units

Calculate the work done (in J) by an 80.0 kg man who pushes a crate 4.15 m up along a ramp that makes an angle of 20.0° with the horizontal. (See the figure below.) He exerts a force of 505 N on the crate parallel to the ramp and moves at a constant speed. Be certaln to Include the work he does on the crate and on his body to get up the ramp.

(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 e with respect to the horizontal. The coefficient of kinetic friction between block and table is u. Is the force exerted by friction equal to u, mg? If not, what is the force exerted by friction? (Assume 0 is measured above the horizontal.) This answer has not been graded yet. (b) How much work is done by the friction force and by F? (Don't forget the signs. Use the following as necessary: F for the magnitude of F, g, m, x, 0 and u,) WE = (c) Identify all the forces that do no work on the block. (Select all that apply.) O friction f OF Cos(e) OF sin(0) O mE (d) Let m = 2.00 kg, x = 4.50 m, 0 = 3.7°, F = 14.5 N, and u, = 0.400, and find the answers to parts (a) and (b). (Include appropriate signs.) We = W =

A 4 kg crate sitting on a horizontal surface is pushed 30 m by a force of 6N applied at an angle of 27o below the horizontal. How much work is done? If it takes 7.8 seconds to push the crate, how much power was expended?