$\"\"$ \ \

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Force vector is $\"\"$ . \ \

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The points are $\"\"$ and $\"\"$ .

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Position vector :

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If the initial point $\"\"$ and the terminal point is $\"\"$ , then the position vector is $\"\"$ . \ \

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Substitute the points $\"\"$ and $\"\"$ .

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$\"\"$

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The position vector is $\"\"$ . \ \

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$\"\"$ \ \

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Work done is $\"\"$ , Where F is the force and u is the position vector. \ \

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The work done is $\"\"$ \ \

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Substitute $\"\"$ and $\"\"$ in $\"\"$ . \ \

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$\"\"$ \ \

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The work done is $\"\"$ .

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$\"\"$

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The work done is $\"\"$ .