A force (3hati+4hatj) newton acts on a b...

A force `(3hati+4hatj)` newton acts on a boby and displaces it by `(3hati+4hatj)` metre. The work done by the force is

10 J

12 J

16 J

25 J

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The correct Answer is:

(d) Given, Force `F=(3hati+4hatJ)N` and Displacement, `" "s=(3hati+4hatj) m`
`:. "Work done", W=F.s=(3hati+4hatj).(3hati+4hatj)`
W=9+16
`implies" "`W=25 J

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