## Physical ScienceChapter 5Work in addition so that MachinesWhat is work Work: is

Physical ScienceChapter 5Work in addition so that MachinesWhat is work Work: is the transfer of energy that occurs when a force makes an object move. Conditions that must be met in consideration of work so that occur:The applied force must make the object moveThe movement must be in the same direction as the applied forceWork in addition so that EnergyHow are work in addition so that energy related When work is done, a transfer of energy always occurs Calculating WorkThe amount of work done depends on the amount of force exerted in addition so that the distance over which the force is applied.Work (in joules) = applied force (in newtons) x distance (in meters)W = FdExample ProblemYou push a box alongside a force of 100 N. If you move the box a distance of 5 m while you are pushing, how much work do you do List what you know in addition so that what you want so that solve in consideration of : F = 100 ND = 5 mW = Formula: W=FdSubstitute: W = 100 x 5 = 500Units: units of work is in joulesAnswer: 500 JPowerPower: power is the rate at which work is doneUnit in consideration of Power is watts Power (watts) = work (joules) / time (seconds)P = W/t Example ProblemYou do 900 J of work in pushing a sofa. If it took 5 s so that move the sofa, how much power did you use List what you know in addition so that what you are solving in consideration of :W = 900 JT = 5 sP = Formula: P = W/tSubstitute: P = 900/5 = 180Units: Unit in consideration of power is in wattsAnswer: 180 watts (180 W)