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You slide a box of books at constant speed up a 30 ∘ ramp, applying a...

You slide a box of books at constant speed up a 30 ∘ ramp, applying a force of 210 N directed up the slope. The coefficient of sliding friction is 0.18.

1.How much work have you done when the box has risen 1 m vertically?

2.What is the mass of the box?

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