A student pulls a 10 kg wagon with a constant 140 N force at an angle 45 degrees above the horizontal for a distance of 3.0 m. how much work did the student do on the wagon? what type of motion is the wagon experiencing ( e. g, constant speed, acceleration, etc)?
the student gets tired and his force on the wagon decreases according to the graph at right. what was the work done by the student on the wagon during this part of the motion?

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