Moments of forces | Ladder leaning against a smooth wall and rough floor (2/2)

[@aly369]

This has got to be the best explanation I have had of a ladder moments question! Thank you so much!

[@ExamSolutions_Maths]

aly369 Thanks for your comment and using my work.

[@therealaquacree]

I have my pure and mechanics A Level exam this afternoon (almost 2 hours) and I have never been able to do this topic. After watching both of your videos on ladders, finally I can do it. I attempted this second question after watching the first video, and I finally got the answers right. Thank you for such clear, simple explanations on a topic that is overlooked by most teachers.

[@yimnaineruszaumu3082]

thanks so much for this video. I'm in grade 12 and I have always had issues with mechanics due to the difficulties i faced with ladder problems. It actually scared me until I came across this video. Thanks a million. God bless you!

[@pineapple_1066]

Omg I can't believe I am understanding this so quickly! Thank you so much!

[@ExamSolutions_Maths]

That's good - Thanks for watching

[@nebulosawilczak4041]

Best explanation ever about how to find the angles!

[@Mikebigmike94]

thank you for the Moments series, its helped with uni, it can be hard to learn this stuff from a textbook.

[@CuppaT2000]

This is a brilliant explanation, thank you so much!!

[@ExamSolutions_Maths]

Thank you for your comment. Pleased to hear you found it useful.

[@KumOdetteEnowmbi]

Wow clear explanation thank you

[@midnightmadness1714]

Such a helpful video for me and my class fellows. Our fp math teacher is not even serious about the work Please keep up the good work😍😍😍

[@michaelodonoghue8466]

beautifully clear. thank you

[@ExamSolutions_Maths]

So glad!

[@ExamSolutions_Maths]

Thanks

[@ameen6796]

Thanks a lot . I learned a lot from your videos . You explain it so good.

[@tr3534]

Explanation was good...

[@mghosh4748]

Thanks sir, It is very well taught..best explanation I have ever seen..

[@ExamSolutions_Maths]

Thank you. I am pleased it helped.

[@abeselombelete7052]

Best explanation 👌 and at 17:50 you found R2 which is force from the wall not the ground

[@AH-tm9ly]

I don't understand why µ was × by R1 in order for it to be "at the point of slipping"

[@ExamSolutions_Maths]

F= mu * R is the general formula for the frictional force acting on a particle as it depends on the smoothness of the surface (mu) and the reaction force at the point of contact with the surface (R1 at A). Although it's 'at the point of slipping', there is still a frictional force.

[@malanhemal6574]

Thank you Sir, what an explanation 💛💛🧡🧡💥💥

[@honestvalley9]

Sir: Were the value of mu to become four-fold of the present root what could one then surmise? It’s obvious it would become more difficult to budge the ladder, but what else can one express?

[@thepenguin441]

Thankyou so much.🙏

[@halimabegum4630]

Can you do a video on taking moments from points that are not on the body and also using triangle of forces to solve problems where a rigid body is in equilibrium under 3 non-parallel forces please? (If you have not done them already)

[@5firehawk]

have you done a video on solving problems using a triangle of forces for a rigid body under the action of 3 non parallel forces

[@mattharris1930]

thank you so much, lifesaver

[@krishnachakraborty9453]

Awesome explanation ,thanks a lot man

[@ExamSolutions_Maths]

No problem. Pleased to hear it helped.

[@milk1e115]

why the L has just been canceled out? It is suppose to have L on the left of the equation?

[@prophetmax9941]

God bless you so much

[@KumOdetteEnowmbi]

More videos please

[@tuktuk3609]

I dont understand that when you take moments from B and use R2 why its R2sin60 and not R2sin30. Please help.

[@tuktuk3609]

@AJ2 sorry i meant to say moments from A.

[@bennybenson4642]

It's hard to put into words really, but check out this video of his (kzbin.info/www/bejne/nJe8pomGpJ6Uatk) - he explains it really well here. Good luck with the exams this summer bro!

[@jeremiahbaker6396]

brilliant

[@knap-dalf2215]

If the wall wasn't smooth the frictional force would be acting upwards wouldn't it?

[@ExamSolutions_Maths]

Knap- dalf At the top of the ladder, yes.

[@yanfrancis3054]

wat if after u find R1 u take moments about B to find Fr.. then use Fr and R1 to find u {coefficient of friction}

[@damirgumauri1346]

yea it should work

[@surtmcgert5087]

why is the frictional force = mue * R1 ?

[@ExamSolutions_Maths]

F= mu * R is the general formula for the frictional force acting on a particle as it depends on the smoothness of the surface (mu) and the reaction force at the point of contact (R1 at A).

[@surtmcgert5087]

@@ExamSolutions_Maths oh, i was never told about this, thank you so much lmao

[@michaelclarke6984]

Thanks, my teacher was less than helpful on this.

[@ExamSolutions_Maths]

Pleased to hear it helped. Thanks for watching.

[@yimnaineruszaumu3082]

thanks so much for this video. I'm in grade 12 and I have always had issues with mechanics due to the difficulties i faced with ladder problems. It actually scared me until I came across this video. Thanks a million. God bless you!

[@ExamSolutions_Maths]

I am pleased to hear that the videos are helping. Thank you for viewing. I hope other videos on my site will help too.