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## Homework Statement

A chair of mass 13.0 is sitting on the horizontal floor; the floor is not frictionless. You push on the chair with a force = 45.0 that is directed at an angle of 40.0 below the horizontal and the chair slides along the floor.

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**b]2. Homework Equations**[/B]

These were given to me to help.

N= w-F1sin()

Fcos()=ma

## The Attempt at a Solution

with the equations given to me by the TA I thought that the answer would be 9.8*13-45sin(), but I keep getting the answer incorrect(my class uses masteringphysics for hw) and I even tried all sorts of other crazy equations.

Please Help, I am on the verge of Physics Failure.:grumpy: