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## Homework Statement

http://www.screencast.com/users/ntrinh3/folders/Jing/media/7b6a2810-2827-44c3-adfc-cd27d564b812

## Homework Equations

Wnet=change in KE

## The Attempt at a Solution

so I made the coordinate with x positive in right direction and y is positive up.

Fdcos30-mgh=.5mv^2

40*.2*cos30 - 5*9.8*sin15*.2 = .5*5*v^2

I got velocity to be .900

The correct answer was .6