Physics, Torque (12 of 13) Static Equilibrium, Ladder Problem

Static Equilibrium, The Ladder Problem; Shows how to use static equilibrium to determine the force of friction between the bottom of the ladder and the ground surface. The sum of the forces in the x-direction, the sum of the forces in the y-direction and the sum of the torque are set equal to zero.

Torque is a rotating force. It is a measure of how much force is acting on an object that causes the object to rotate. The object will rotate about an axis, which is called the pivot point. It is labeled with the letter P or O. The distance from the pivot point to the point where the force acts is called the moment arm or the lever arm. This distance is labeled with the letter r. This distance r is also a vector, and points from the axis of rotation to the point where the force acts. The force is labeled with the letter F.

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[anissagonzales]

i just watched all 12 of your torque videos and i just want to say thank you so much!!! you help students like me who struggle so much with certain concepts. i feel so much better about my midterm now, thank you for taking the time to make these!

[danielsmith]

i have found in my many college classes that there are 2 types of teachers. teachers like you are the best, they actually want their students to learn and understand. and the other are there to flex their brains so to speak. making thngs way harder than they need to be to appear more impressive.

[Napkinholdin]

My goodness... I'm not so good at this critical thinking sometimes, so given this problem to solve even with all of the tools, I wasn't able to "put it together" like a puzzle. Thank you for the succinct walk-through on how to solve these ladder problems <3

[kelsea]

wow my physics teacher makes this so much harder than it needs to be

[aklilumengesha]

my physics teacher suggested me to watch this really thank u for the brief explanation

[BarcaOwl]

Thanks man, feels bad when you say that's alot to do and my physics department is probably laughing at the prospect of putting a problem so simple to them on the exam.

[DeLaHaProductions]

That helped out a lot thanks! The best explanation of this problem I could find online. 

[JesusMartinez-zuxl]

you made this problem so easy to follow!

[peterholmes]

I'll start off by saying thank you so much for these videos! I'm studying physics with the OU alongside my full-time job and having content like this really helps me understand concepts faster than using my textbooks!

A quick question on this though, would there not be a coefficient of friction where the ladder meets the wall? Assuming the ladder is stationary there would be a coefficient of static friction and if the ladder were sliding there would be a coefficient of sliding friction.

[AbrhaArsema]

I have great thanks for you .keep it up 💯💯💯💯💯 percent

[srijanbhowmick]

Why are we choosing the bottom end of the ladder to calculate the torque ?
Why can't we use the center of mass of the ladder ?

[ptyptypty]

Most Excellent!! thank you... great graphics... that's a cool program you're using.... so easy to read and follow...

[lessejesse]

How do you decide which point is best to take the torque from?

[cfopeter]

Great explanation of the problem, thank you sir!

[andrewcarnegie]

Just a query can we take torque from the point on the wall? Btw nice lecture

[lokkilokesh]

clearly understood sir thanq this makes me good marks in my semister

[jessicalaczny]

Why aren't the weight forces broken down into components? Aren't they both at angles instead of being perpendicular to the ladder?

[AdamBehnam]

Thanks bro! With this video I subscribed to your channel! :)

[tilakpatel]

Shouldn't the Ff be (-247N)? It's in the opposite direction.

[alwysrite]

Are we assuming that friction between ladder and wall = zero for this example?