Question

The workdone by a force F= 2i-J-k in moving
object from origin to a point whose
position vector is​

Answer 1

We know that work done by a force is,

W=∫F.dr. Since force F is constant in this case,

W=F.(r

2

−r

1

)=(2i−j−k).(3i+2j−5k)=6−2+5=9 J