Posted by **annonymous** on Sunday, January 22, 2012 at 5:42pm.

a 43.7 kg student runs down the sidewalk and jumps with a horizontal speed of 4.48 m/s onto a stationary skateboard. the student and the skateboard move down the sidewalk with a speed of 4.25m/s. find the mass of the skateboard in units of kg. how fast would the student have to jump to have a final speed of 6.94 m/s?

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