Rate of work done by the external force is

13.5 W

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zero

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6.75 W

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27.0 W

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Solution

The correct option is C 6.75 W
Rate of work done $= \to F \cdot \to V$
by enternal force $= (4.5) (\frac{ˆ i}{2} - \frac{\sqrt{3} ˆ j}{2}) (3 i)$
$= 6.75 W$

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Please explain how TOTAL WORK DONE = WORK DONE BY CONCERVATIVE FORCES + WORK DONE BY NON- CONCERVATIVE FORCES + WORK DONE BY EXTERNAL FORCE

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