A 42.0-kg boy, riding a 1.50-kg skateboard at a velocity of 5.50m/s across a level sidewalk, jumps forward to leap over a wall.Just after leaving contact with the board, the boy's velocityrelative to the sidewalk is 6.00 m/s, 8.30° above thehorizontal. Ignore any friction between the skateboard and the sidewalk. What is the skateboard's velocity relative to theside walk at this instant? Be sure to include the correct algebraicsign with your answer.