When a body doesn't get displaced though energy is utilized, explain why work doesn't happen?for eg. when weight lifter keep the weight at certain position in stable condition then ,work doesnt...

When a body doesn't get displaced though energy is utilized, explain why work doesn't happen?

for eg. when weight lifter keep the weight at certain position in stable condition then ,work doesnt happened,explain. 

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trophyhunter1 | College Teacher | (Level 1) Educator Emeritus

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The formula for work is W=Fxd, where W stands for work, F stands for force and d stands for distance. The units for work are in Newton meters also known as Joules. For work to be done, the force must act on a body over a distance. If something doesn't move, no work will be done. Work on an object is equal to the change in kinetic energy of the object. This is the energy of motion. If someone is holding an object in a position without moving the object, then the energy is actually potential energy and not kinetic energy of motion. Therefore, if the object doesn't move, no work is performed. If a vase is on a table, and not moving, although the table exerts an upward force and the vase exerts a downward force, there is a net movement of zero meters. Therefore, no work is performed.

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