The turning effect of a force Is what we call Moment The size of the force, of course Is the first component And this we multiply Force to Fulcrum distance by [Break] Force is measured in newtons Distance oft in meters comes So Moment, multiplying them Is, naturally, N-M [Break] Think screwdriver and a tin Under lid you wedge it in Then as you push down on it Tin lifts up and off a bit That's Moment's turning action To our benefaction [Break] The turning effect of a force Is what we call Moment The size of the force, of course Is the first component And this we multiply Force to fulcrum distance by [Break] Now let's quickly calculate The Moment that we did create Screwdriver five meters long No, you didn't hear that wrong [Break] Downward force is newtons three For multiplying easily Three newtons times meters five To 15 N-M we arrive [Break] And as you may infer To Moment make larger Just get a leever longer Or apply a force that's stronger [Break] The relationship's proportional If one we halve and other double Our moment stays the same Though force and distance change [Break] But let's end by tackling Moment's use in balancing Take a playground seesaw's ends On them place unequal friends [Break] See heavier side go down But situation turn around Have lower friend closer wiggle To Fulcrum in seesaw's middle [Break] And soon you'll have perceived That balance is achieved With equal Moment on each side In height both friends are now tied [Break] And lighter friend may yet go To be the one sat below If heavier friend goes on Wiggling towards the Fulcrum [Break] The turning effect of a force Is what we call Moment The size of the force, of course Is the first component And this we multiply Force to fulcrum distance by
