Posted by **Anonymous...** on Thursday, November 17, 2011 at 9:56pm.

A 41.2 kg student runs down the sidewalk and

jumps with a horizontal speed of 4.36 m/s onto a stationary skateboard. The student and skateboard move down the sidewalk with a speed of 4.12 m/s.

a. Find the mass of the skateboard (in kg)

b. How fast would the student have to jump to have a final speed of 5.76 m/s? (in m/s)

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