what do u mean positive negative n zero workdone give examples?

Question

every thing about the question

Answer 1

Positive work is done when the displacement is in the direction of the force applied.

Negative work is done when the displacment is in the direction opposite to the force applied.

Zero work is done when there is no dispalcement, even i some effort is applied-eg. just holding a mass.

st

Answer 2

Doing work requires energyy (energy is the ability to do work).
The amount of energy consumed is used to describe the amount of work done on/by an object.

Sometimes you will see word recorded with a positive or negative value (0 work means that no work was done, no energ consumed). The sign on the work does not literally mean "positive" or "negative" energy, but rather indicates the direction of the energy flow.
A positive value for work means that the work was done ON the system, energy flowed inward, increasing the its total energy value.
A negative value for work means that the system did work on something else, work was done BY the system, thus decreasing its total energyy value.

Due to the law of conservation of energy, an increase in energy in one place is always accompanied by a decrease in energ somewhere else. Thus, when the system does positive work, the surrounding environment has done negative work, and vice versa. Generally, we done think of something as doing +/- work, we just say that the object did work or had work done on it.

Answer 3

you need to rephrase the question. that's why nobody's answering. we don't get it dude.