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## Homework Statement

A force acting on an object moving along the x axis is given by F

_{x}= 10x-2.0x

^{2}N where x is in m. How much work is done by this force as the object moves from x = -1 to x= +6

Distance = 7 m

## Homework Equations

Work = Force * Distance cosine theta

## The Attempt at a Solution

The equation for force is already given so I found force by integrating the equation F

_{x}= 10x-2.0x

^{2}to get F

_{x}= 10-4.0x then I substituted the x for 7 to get -18 Joules. The problem I have is that the answer I got isn't among the options.