Homework Help: Physics

Posted by Cornelius on Thursday, November 11, 2010 at 9:19pm.

*62. A 40.0-kg boy, riding a 2.50-kg skateboard at a velocity of +5.30 m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with the board, the boy's velocity relative to the sidewalk is 6.00 m/s, 9.50° above the horizontal. Ignore any friction between the skateboard and the sidewalk. What is the skateboard's velocity relative to the sidewalk at this instant? Be sure to include the correct algebraic sign with your answer.

Physics - drwls, Thursday, November 11, 2010 at 9:45pm
Your question contains its own answer.

"..the boy's velocity relative to the sidewalk is 6.00 m/s, 9.50° above the horizontal."

The components of the velocity are:
6.00 cos9.5 = 5.92 m/s horizontal and
6.00 sin9.5 = 0.99 m/s vertical
Physics - Anonymous, Wednesday, March 14, 2012 at 10:25pm
(6-5.5)cos(7.3)

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