relationship of energy and workwork = force x displacement suppose i went to office and came back so my displacement will be zero , does that mean i have done no work at all despite the loss of...

relationship of energy and work

work = force x displacement suppose i went to office and came back so my displacement will be zero , does that mean i have done no work at all despite the loss of energy i have incurred?

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trophyhunter1's profile pic

trophyhunter1 | College Teacher | (Level 1) Educator Emeritus

Posted on

Work is force times distance. A force is applied on an object over a distance. It must be displaced for work to be done. Therefore, standing in the same spot holding a box, without moving means no work is done on that body. However, if you carry that box from point A to point B, work is done in Joules.

thilina-g's profile pic

thilina-g | College Teacher | (Level 1) Educator

Posted on

First of all.

Work is defined as the scalar product of force and displacement.

W = F.s

Therefore it is a scalar, it is not a vector. So you just add them up and you dont take a sign into account.

Therefore total work you done = Work from home to office+ work from office to home.

They add up, they dont cancel out.

Energy is also the same. It is a scalar too, not a vector.

elekzy's profile pic

elekzy | Student, Grade 11 | (Level 1) Valedictorian

Posted on

Work = F*d

        =  J

Energy= J

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