Initially at rest, a box moves down an incline which is 25 degrees up from the horizontal. While the box is moving down the

Question

Initially at rest, a box moves down an incline which is 25 degrees up from the horizontal. While the box is moving down the incline, the friction between the box and the surface is 0.200. After sliding a distance of 10.4 m down the incline, the box continues off the edge without slowing down. The box lands on a surface which is 3.5 m below the edge of the incline. What speed does the box have just before it lands?

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