Taken from street level |

Holy stairs, Batman! That's a long trek just to get to the front door. Golly, it's a good thing I have my handy-dandy grappling hook with me!

Okay, kids, physics time.

A force that forces an object to move in a circular path is called a centripetal force.

centripetal force= mass* radius* angular velocity

^{2}.So if I swing my grappling hook of mass 1 kg on a (massless) line 1 m long at a rate of 2 revolutions/second, I can calculate the centripetal force.

First, we'll find the angular velocity (which needs to be in radians/second for this to work).

(2 ~~revolutions~~/second)(2Π radians/1 ~~revolution~~)= 4Π radians/second

And then we can plug that in...

*yeah, we're not doing this step by step. you're smart people, you can figure it out yourselves*

And we get

*centripetal force= 16Π*^{2 }N.Of course, at this point, all you guys are interested in is my homemade grappling hook. Take it from me, you do not want to try (emphasis on "try") to climb

*anything*with a homemade grappling hook. Either buy a well-made one or use the stairs. (Or, well... Christmas is coming up! Y'all still have time to badger your parents.)