Question: A box is given an initial shove up a rough hill. As it moves up the only forces acting on it are its weight, the

A box is given an initial shove up a rough hill. As it moves up the only forces acting on it are its weight, the normal force, and kinetic friction. Which of these forces does positive work on the box as it moves up the hill?

1 .

None of them

2 .

Weight only

3 .

Weight and friction

4 .

All of the,

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