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A force F = (5 hati + 3hatj) newtons is...

A force `F = (5 hati + 3hatj)` newtons is applied over a particle which displaces it from its origin to the point `r = (2 hati - hatj)` metres . The work done on the particle is.

A

`- 7` joules

B

`+13` joules

C

`+ 7 ` joules

D

`+ 11` joules

Text Solution

Verified by Experts

The correct Answer is:
C
`W = vecF.vec S = (5 hati + 3 hatj). (2 hati - hatj) = 10 - 3 = 7J`
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