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A 5 kg block moves in a straight line on...

A 5 kg block moves in a straight line on a horizontal frictionless surface under the influence of a force that varies with position as shown in the figure. Find the work done by this force as the block moves from the origin to x = 8m.

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The work from x = 0 to x = 8 m is the area under the curve.
`W=10xx2+(1)/(2)(10)(4-2)+0+(1)/(2)(-5)(8-6)`
`=25J`
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