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

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

A

`-7`

B

`+7`

C

`+10`

D

`+13`

Text Solution

Verified by Experts

The correct Answer is:
B
`W=vec(F).vec(r )=(5hat(i)+3hat(j)+2hat(k)).(2hat(i)-hat(j))=10-3=7 J`
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