A force of $(3\,\hat i + 4\,\hat j)$ Newton acts on a body and displaces it by $(3\,\hat i + 4\hat j)\,m.$ The work done by the force is .............. $\mathrm{J}$
A force of $(3\,\hat i + 4\,\hat j)$ Newton acts on a body and displaces it by $(3\,\hat i + 4\hat j)\,m.$ The work done by the force is .............. $\mathrm{J}$
$10$
$12$
$16$
$25$
A force of $(3\,\hat i + 4\,\hat j)$ Newton acts on a body and displaces it by $(3\,\hat i + 4\hat j)\,m.$ The work done by the force is .............. $\mathrm{J}$
$W = \overrightarrow F .\overrightarrow s $$ = (3\hat i + 4\hat j).(3\hat i + 4\hat j) = 9 + 16 = 25\,J$
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