A 47.4 kg student runs down the sidewalk and jumps with a horizontal speed of 4.2 m/s onto a stationary skateboard. The student and skateboard move down the sidewalk with a speed of 3.95 m/s. How fast would the student have to run initially to have a final speed of 5.0 m/s?
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A 47.4 kg student runs down the sidewalk and jumps with a horizontal speed of 4.2 m/s onto a station...
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