Question
If a particle is compelled to move on a given smooth plane curve under the action of given force in the plane
`vec(F)` =` vec(XI)` +` vec (yj)`. Then
Answer: Option A
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`vec (F) * d vec(r) = ( x hat(i) + y hat(j)) * ( dx hat(i) + dy hat(j))`
= `xdx + ydy`
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