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WORK-When force




                                     applied produces




                    displacement in an object.












                     Formula- W=F.S





                                                                                             TYPES OF WORK
                      S.I unit of work                                                        Positive work



                                                                                               Negative work
                               is Joule (J)                                                     Zero work














                                                    Work done is negative
                   Work done is positive              when applied force
                    when applied force                       produces                     Work done is zero

                          produces                    displacement in the                   when force and
                    displacement in the              direction opposite to                 displacement are
                     direction of force.                                                perpendicular to each
                                                               force.                             other.

                                                                                           Work done is also

                                                                                           zero when either
                                                                                        force or displacement
                                                                                           or both are zero.
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