$\"\"$

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The chain makes an angle of $\"\"$ with the road.

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The tension in the chain is $\"\"$ .

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Find the work done by the truck in pulling the car $\"\"$ .

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The horizontal component of the force is $\"\"$ .

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

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$\"\"$

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$\"\"$ .

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The distance $\"\"$ .

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The work done by the truck is $\"\"$ .

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

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$\"\"$

\

$\"\"$

\

$\"\"$ .

\

Therefore, the work done by the truck in pulling the car $\"\"$ is $\"\"$ .

\

$\"\"$

\

The work done by the truck is $\"\"$ .