A force F⃗ = (5î + 3ĵ) Nis applied over a

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A force $\vec F = (5\hat i + 3\hat j)\;N$is applied over a particle which displaces it from its original position to the point $\vec s = (2\hat i - 1\hat j)$m. The work done on the particle is.........$J$

A

$+ 11 $

B

$+ 7$

C

$+ 13$

D

$-7 $

A force $\vec F = (5\hat i + 3\hat j)\;N$is applied over a particle which displaces it from its original position to the point $\vec s = (2\hat i - 1\hat j)$m. The work done on the particle is.........$J$

$W = \overrightarrow F .\overrightarrow s $$ = (5\hat i + 3\hat j).(2\hat i - \hat j)$$ = 10 - 3$ = $7\,J$