Static Equilibrium - Tension, Torque, Lever, Beam, & Ladder Problem - Physics

This physics video tutorial explains the concept of static equilibrium - translational & rotational equilibrium where everything is at rest and there's no motion. This video contains plenty of examples and practice problems.
Static Equilibrium:
• Static Equilibrium - T...
Elasticity and Hooke's Law:
• Elasticity & Hooke's L...
Tensile Stress:
• Tensile Stress & Strai...
Elastic Modulus:
• Stress & Strain - Elas...
Bulk Modulus:
• Bulk Modulus of Elasti...
___________________________
Volume Unit Conversion:
• How To Convert Cubic C...
Specific Gravity & Density of Mixtures:
• Specific Gravity and D...
Will It Sink or Float?
• Will It Sink or Float?
Intro to Pressure & Fluids:
• Introduction to Pressu...
Atmospheric Pressure Problems:
• Atmospheric Pressure P...
____________________________
The Gallon Crusher:
• Physics - Fluids & Pre...
Absolute Pressure Vs Gauge Pressure:
• Absolute Pressure vs G...
Water Pressure Vs Gauge Pressure:
• Water Pressure, Gauge ...
Full-Length Videos and Worksheets:
/ collections
Physics PDF Worksheets:
www.video-tuto...
Here is a list of topics:
1. Static Equilibrium Problems
2. Balancing a Seesaw - Lever Problem - Using Forces and Torques
3. Torque equals force times lever arm / moment arm
4. Positive and Negative Torques - Clockwise vs Counterclockwise rotation
5. Hanging Sign Tension Problem - Finding the tension in the two cables at two different angles
6. Hanging sign attached to a beam problem - how to calculate the horizontal and vertical components of the force exerted by the hinge and pivot point
7. Hanging sign attached to a beam at an angle - determining the tension force in the cable
8. Ladder Problem - How to find the force exerted by the wall on the ladder and the horizontal and vertical components of the force exerted by the ground / floor on the ladder.
9. Ladder problem with man on top. How to determine the coefficient of static friction that prevents the ladder from sliding down - Normal force and static frictional force calculations.

[@TheOrganicChemistryTutor]

Final Exams and Video Playlists: www.video-tutor.net/ Full-Length Videos & Worksheets: www.patreon.com/MathScienceTutor/collections Next Video: kzbin.info/www/bejne/fnKvk6evebqdppI

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Second hanging sign problem - I did have to watch it 5 times for it to really sink in, but now I think I finally understand the concept of Torque = Fr(perpendicular). I kept asking my professor how it relates to SOHCAHTOA in geometry because I knew there was a connection. But he kept telling me not to think of it that way. Your explanation is so clarifying. Thank you!

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[@Yaya_Roshe]

I want to clarify to the problem of a Beam and 20kg block. Isn't Normal Force supposed to be added to the sum of the Forces in the Y Direction?

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[@vythinathanduraiswamy3430]

Excellent pace and very illustrative problems, thank you. However, in the first ladder problem, was wondering why you did not consider Fwy at the wall. Then, in the 2nd ladder problem which was the last problem, you mentioned to assume no friction at the wall. So I assumed the same applied to the first problem too. Would be interesting to solve with assumption of friction!

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[@kaniesah]

at 27:09 where did you get 9.8 when you calculated the weight of the beam?

[@nmingg4258]

I know it's 2 years late but 9.8 is the value of gravity pull. You'll need it to calculate the force that the mass exerts so you multiply the mass with 9.8

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[@ahmedrazaabbasi5998]

At 16:35 sin 50 = 0.766 by adding sin 40 and 50 we get value of 1.409 and if we divide 784/1.409=556

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[@kladdkakan9835]

At 9:00. Dont we have a force in the line between the mass and the to seperated lines?

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[@chereoge]

In 34:30, While calculating the sum of the net forces in the Y direction, why didn't you add the force holding the block up. Isn't there supposed to be a force( Another tension force maybe, 🤷🏽‍♀️ that holds the block upwards?

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[@v4m3r68]

Static equilibrium also needs momentum to be zero. If it's only constant diffrent from zero we say that it is just a equilibrium.

[@mahipatel291]

For the last question, why do we not consider the normal reaction force acting on the person?

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[@SebastianPerez-jz9tk]

You teach at a perfect pace

[@legendj.a291]

42:30 you did mistake here. The angle for torque 2 and 3 should be 30 not 60

[@aroldibrahimcanapi6364]

I was trying to find a comment who also noticed that. Thank you.

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[@harryiguana1761]

why at 34:23 we don't have a tension force in the y-direction for the y components?

[@pranjalverma3501]

I CAN NOT UNDERSTAND WHY AND HOW THE HINGE WILL EXERT FORCE ON THE BEAM IN 35:00,but anyway very nice video.

[@XxTheSuperHeroxX]

The hinge is exerting force to keep the beam from sliding

[@windthugness]

At 20:00 why wasn’t the normal force acting on the box used as a Y component?

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correction on 30:03 is 4213 not 4214

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[@codymitchell6302]

I thought that only the perpendicular component of the force mattered when calculating the torque on the object, so why would tension be factored in to the problem at time 35:58?

[@codymitchell6302]

Nevermind, I now realize our coordinate axes are different for the net torque than they are for the net force.

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[@danieljohncanedacatudio5072]

Please guide me in this problem... Two people, at the ends of a uniform beam that weighs 400 N, hold the beam at an angle of 25° to the horizontal. How large a vertical force must each person furnish to the beam?

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[@hydreigon13]

why is it that there are two forces for the component of ground on ladder but not wall on ladder?

[@Spectrojamz]

Yeah I'm still confused about that

[@aiza2513]

I'm guessing that's because Fw is acting along x-axis and so it's y-component is 0 😄

[@Spectrojamz]

@@aiza2513 I later figured it out 😄 The ground has to exert an opposing force in the x direction for it to keep the ladder from sliding horizontally... The ground somehow acts like the force of friction... It opposes the motion of the block so it doesn't slide backwards...thereby resulting in falling 😂...I pity anyone that's on the ladder during this incident

[@Spectrojamz]

Opposes the motion of the ladder** 🤦🏾mistake

[@aiza2513]

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Thank you

[@noormartin3374]

Thank you for your help!

[@megansullivan5391]

for the problem with the ladder around 50 minutes, why does the wall only exert a horizontal force but not a vertical force, but the ground does both horizontal and vertical?

[@immortaulir7816]

Normal force in the action probably

[@7xxod.37]

@@immortaulir7816 what do you mean?

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[@felipebonadykov2919]

Why is there no F wall y in this video (exercise minute 50:00 )

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absolute lifesaver!

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[@hennaali5814]

21:08 why isn’t “normal force” included in the net force in the Y-direction?

[@abed839]

bc Nf is in center so it does make any torque

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you were born with this

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Why Fw is horizontal?

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if the meter stick has a length of 2mtrs, without any object attached, if i tie rope into meter stick in .5mtrs as mentoined above meter stick has 2 mtrs of total length, what is the angle of meters stick after i tie into rope?

[@h.k.4606]

in 35:05 why didn't you use FHy to find FHx?

[@xahmed9464]

HK? more like hoe killer

[@yzakvargas4968]

Hi. At 45:20, to find the ladder's angle with the ground, is it valid to use Sin^-1 (8/10)?

[@ceaganbothma1855]

Hi,yes it is I did exactly that and got the same answer he got.

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[@Ang-yl6ob]

how do you know which is counter and which clockwise?

[@earthtan4290]

In the first question where he get the 9.8? Plss spread help 😉

[@janchan2258]

in 22:03 why didn't you calculate the normal force

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I love you sm!!!

[@Doritis264]

Why we take center of 10m

[@zulyc8641]

life. saver. thank you so much

[@ericaespecio8884]

is it necessary to find first the value of T1?

[@elinashevilov3064]

Pls HELP at 30:04 I got T=2107 Why is the Torque of T1 is Tsin(30)*(2) and not T*r ?? I AM CONFUSEDDD