A sledge loaded with bricks has a total mass of 17.9 kg and is pulled at constant speed by a rope inclined at 21.0° above the horizontal. The sledge moves a distance of 19.7 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.500. (a) What is the tension in the rope? (b) How much work is done by the rope on the sledge? kJ (c) What is the mechanical energy lost due to friction? k)

A snowmobile is pulling a sled (m = 380 kg) across the snowy tundra (see the figure below). The snowmobile applies a pulling force of 2480 N at an angle of pulls the sled over a distance of 49.8 m. (a) How much work is done by the snowmobile? 118719.66 J 0° (b) If the sled is also being acted on by a constant kinetic friction force of 240 N and it started from rest, what is the final speed of the sled? 2848.55 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. m/s Need Help? Read It 16° with respect to the ground and

A 2.28 kg block is pushed 1.69 m up a ver- tical wall with constant speed by a constant force of magnitude F applied at an angle of 60.8° with the horizontal. The acceleration of gravity is 9.8 m/s². 60.8° F 2.28 kg If the coefficient of kinetic friction between the block and wall is 0.631, find the work done by F. Answer in units of J. Answer in units of J. Your response... i Previous Responses X #1.37.76 PALETTE

A barge of mass 5.00 x104 kg is pulled along the Erie Canal by two mules, walking along towpaths parallel to the canal on either side of it. The ropes harnessed to the mules make angles of 45.0° to the canal. Each mule is pulling on its rope with a force of 1.40 kN. How much work is done on the barge by both of these mules together as they pull the barge 166.1 m along the canal? 235 8 kJ