Asked by Kennedi
                A skateboarder with a mass of 68.6 kg and a speed of 4.92 m/s coasts across a parking lot. After coasting for 35.0 m the skateboarder has a speed of 1.12 m/s. How much work has been done against friction?
a) 338 J
b) 76.8 J
c) 7.5 J
d) 787 J
            
        a) 338 J
b) 76.8 J
c) 7.5 J
d) 787 J
Answers
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