Magtanong at makakuha ng eksaktong mga sagot sa IDNStudy.com. Alamin ang mga maaasahang sagot sa iyong mga tanong mula sa aming malawak na kaalaman sa mga eksperto.

is there work done a man lifting a box to be placed on a table?

Sagot :

The work done on lifting a box is equal to weight times the vertical distance it moves. (with a constant velocity)

W = Weight(Fgravity)*h
The weight of an object equals the mass(m) times the acceleration due to gravity(g).
W = mgh

But take note that there is also work done by gravity which is equal to mgh.
Wgravity = mgh

The net work done is equal to zero
W + (-Wgravity) = 0
View image IssaYalu