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A box of mass m slides with an initial velocity of 3 m/s down a 1.2...

A box of mass m slides with an initial velocity of 3 m/s down a 1.2 meter long ramp which is inclined 20˝ from the horizontal. The coefficient of kinetic friction between the ramp and box is .45.

Question: How much time does it take for the box to get to the end of the ramp?

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