A loader applied $150 N$ of force to lift a stone and $1250 J$ of work was done by it. How far was the rock lifted during the application of force?

9.3 m

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10.3 m

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8.3 m

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7.3 m

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Solution

The correct option is C $8.3 m$
Given:
Work done, $W = 1250 J$
Force, $F = 150 N$

Let the distance the rock was raised be $s$ .
Work done is the product of force and displacement of the body along the force.
$W = F s$
$s = \frac{1250}{150} = 8. ¯ 3 m$

Thus, the rock was lifted through a distance of $8.3 m$ .

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