A force `(vecF) = 3 hati + c hatj + 2 hatk` acting on a partical causes a displacement

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A force `(vecF) = 3 hati + c hatj + 2 hatk` acting on a partical causes a displacement: `(vecs) = - 4 hati + 2 hatj + 3 hatk` in its own direction . If the work done is `6 j`, then the value of `c` is
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