Russian woman falls 4 stories, lands next to 7-11 clerk

[TKDfella]

42 minutes ago, action said:

F=mg is the force of gravity pulling on an object, agreed.  

Since that force acts on every single one of us all day everyday, and was acting on this poor lady since the day she was born,  I guess I assumed you meant the force of the impact, in which F=mg is not the correct formula.  g never changes here on Earth so F=ma is even more inaccurate since at impact the value of acceleration is a large negative number (called deceleration), but you can't have negative force when hitting the ground.  

you guys are fun! 

Matter of notation. direction of 'g' is always quoted as '-g'. Falling objects have both PE and KE where E is conserved in this case. Say a height of 40 meters, and a mass of 60kg, v just prior to impact is just over 28 m/s and total KE just before impact is 23520 J (@28 m/s and neglecting air resistance because only 40 meters).