A student pulls a laboratory cart up an inclined plane with a spring scale asshown in the diagram below. If the scale reads 5.6 N, and the student pulls the cart a distance
of 1.4 m, how much work does she do pulling the cart?

Two masses are connected by a rope that hangs over a pulley as shown below. the pulley is a uniform cylinder of radius 푅=0.381meters and mass 푀=3.1푘푔. initially 푚"is on the ground and 푚#rests 2.5 meters above the ground. if the system is released, use conservation of energy to determine the speed of 푚#just before it strikes the ground. assume the pulley bearing is frictionless.