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How would you calculate the change in energy (J) and the work done along the incline...

How would you calculate the change in energy (J) and the work done along the incline (J) given the following: an object has a mass of 100 kg and is sliding down a ramp at an incline of 20.0 degrees at 4.21 m/s. The ramp is 15.0 meters long, the height of the incline is 5.1 meters and the coefficient of friction is 0.3.

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