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**Jonroberts74** 1) Suppose F is acting vertically downward on an object sitting on a plane that is inclined at an angle of 45 degrees to the horizontal. Express this force as a sum acting parallel to the plane and one acting perpendicular to it.

**F **= || **F**|| cos (?) + ||**F**|| sin (?)

2) an object is moving in the direction **i + j** is being acted upon by the force vector **2i + j**, express this force as the sum of a force in the direction of motion and a force perpendicular to the direction of motion.