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Extra Credit (3 points each) A 25.0-kg box is pushed up a ramp for a (slant) distance of 4.00 m at a constant speed of

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Extra Credit (3 points each) A 25.0-kg box is pushed up a ramp for a (slant) distance of 4.00 m at a constant speed of 10.0 cm/s. The ramp is tilted at an angle of 21" to the horizontal. The frictional force is 2.5 N. How much higher is the box at the end

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