Physics, Torque (11 of 13) Static Equilibrium, Hanging Sign No. 5

Shows how to use static equilibrium to determine the tension in the cable supporting a hanging sign and the force on the beam from the hinge. 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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[danzul]

My lecturer suggested two of your videos for our upcoming quiz ! She said the video was very comprehensible as well as my class, good job !

[ponongkhoo]

Crash Course: Teaches me the intro to static equilibrium.
Step-by-step science: Brings me into doing exercises in reality.
Crash Course + Step-by-step science= Tremendous combo :)

[SamvitAgarwal]

Hey, great video! Can you please explain how you know the direction of the force from the hinge though?
Is there any intuitive way to figure that out?

[Shackled]

Excellent. Def need to go over episode 10-13 again to make sur eI have this foundation down. Thank you!

[ordinarythings]

This really helped. AP Physics test today!

[GuruR]

This video is amazing. Thank you. Taught me in 10 min what my physics teacher couldn't do in a week. However, I did notice one mistake. Starting from 6:57, you set both FTx and FTy as cos35FT, but FTy is equal to sin35FT.

[polarbearanne]

I don't know who you are or why you made this video, but I'd like to thank you! I really needed this breakdown of the forces to understand this concept. Also I like your notation a lot better than my textbook's. In my textbook instead of Fhy, they had Fv. I was staring at it at least 15 minutes just thinking WTH is Fv!?! THANK YOU!!

[samanthalora]

you explained this better than my professor…thank you

[elevenking]

Thank you so muchhhh it really helps my physics homework ❤

[stitchwitch]

This was incredibly helpful - thank you very much!

[noramelia]

Thank you so much! It is very helpful :)

[VALRable]

Than you for these awesome videos. Your torque and equilibrium are the best available. I didn't have a clue how to solve these questions and you helped me through this topic. I am wondering if you have calculus videos available. I would like to find one that explains limits continuity.

[tabz]

why does the hinge produce a force in that direction (perpendicular to the cable)

[windthorpe]

Why does the x component of the hinge force act away from the wall? Isn't it holding the beam against the wall and should therefore be acting into the wall (be in the negative x direction given your coordinate system)?

[jimmyharkin]

Helped me a lot, thanks! But please slow down, you already understand how it's solved but the people watching this dont. We need time to absorb the info!

[Nono-ebb]

Hello, thanks for your great video! Great way of teaching. But I have a question does the hinge always exert a force? And if yes how can we tell its direction?

[brunodavide]

Thank you so much, that was a great lesson. Cheers

[fishertech]

Why would the hinge force not be 35 degrees as well?

[faisal]

for the angel. why didn't you use tan^-1(Fy/Fx)? pls help I got confused.

[s_eliza]

Thank you, this was really helpful! My question here though also says to "find the tension in the cable when it has been shortened so that the beam makes an angle of 60 degrees to the horizontal." 

There's also no hanging mass. Do you know what to do? I'm stuck.