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A force vec F = (5 vec i+ 3 vec j+ 2 vec...

A force `vec F = (5 vec i+ 3 vec j+ 2 vec k) N` is applied over a particle which displaces it from its origin to the point `vec r=(2 vec i- vec j) m`. The work done on the particle in joules is.

A

`+10`

B

`+7`

C

`-7`

D

`+13`

Text Solution

Verified by Experts

The correct Answer is:
B
`W=vecF.vexx=(5hati+3hatj+2hatk).(2hati-hatj)=10-3=7` joules
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