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Problem: Suppose I pull a package with a force of 98 N at an angle of 55° above the horizontal ground for a distance of 60m. What is the total work done by me on the package? Problem : A snail massing .23 kg slides down an incline of 25° at a constant velocity. The snail slides 1.5 m. What is the work done by the normal force, by gravity, and by friction? What is the total work done on the snail? We can start by applying Newton's Second Law and determining the force of friction. Now we need to determine the Normal Force Now what is the work done by each individual force. Work done by the Frictional Force: Work done by the Gravitational Force: Now, to finally determine the "netWork" we add them all up! We could have really determined this from the fact that the snail was sliding at "constant velocity" thus there is no "net-force" acting on the snail, thus Wnet=0J.