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A girl lifts her 20-kg knapsack a vertical distance of 0.70 m and then she carries it 2510 m across the park to the water fountain. The value of the work done by the girl is __________ J.
Answered by Damon
20 * 9.81 * .7

no work is done carrying. Force is not in direction of motion
Answered by dahabo
A girl lifts her 18-kg knapsack a vertical distance of 0.55 m and then she carries it 2510 m across the park to the water fountain. The value of the work done by the girl is
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