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.
physics - Damon, Thursday, July 31, 2014 at 6:19pm
20 * 9.81 * .7
no work is done carrying. Force is not in direction of motion