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Andi Gega
Приєднався 5 лют 2015
Engineering tutoring
Modeling economics with differential equations
A young person with no initial capital invests k dollars per year at an annual rate of return r. Assume that investments are made continuously and that the return is compounded continuously.
a) Determine the sum S(t) accumulated at any time t.
b) If r=7.5% determine k so that $1 million will be available for retirement in 40 years.
c) If k=$2000/year, determine the return rate r that must be obtained to have $1 million available in 40 years.
a) Determine the sum S(t) accumulated at any time t.
b) If r=7.5% determine k so that $1 million will be available for retirement in 40 years.
c) If k=$2000/year, determine the return rate r that must be obtained to have $1 million available in 40 years.
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Відео
How to find the elongation on a cylindrical rod/bolt
Переглядів 2,2 тис.5 років тому
The coupling rod is subject to a force of 5 kip. Determine the distance d between C and E accounting for the compression of the spring and the deformation of the bolts. When no load is applied the spring is unstretched and has a diameter of 0.25 in. The plates A, B, and C are rigid and the spring has a stiffness of k= 12 kip/in.
Shear stress strain diagram
Переглядів 8 тис.5 років тому
The lap joint is connected together using a 1.25 in. diameter bolt. If the bolt is made from a material having a shear stress strain diagram that is approximated as shown, determine the permanent shear strain in the shear plane of the bolt when the applied force P= 150 kip is removed.
How to find the modulus of elasticity
Переглядів 27 тис.5 років тому
A bar having a length of 5 in. And cross-sectional area of 0.7 in^2 is subject to an axial load of 8000 lb. If the bar stretches 0.002 in., determine the modulus of elasticity.
Normal and shear stress on a slanted cross-sectional area
Переглядів 11 тис.5 років тому
The board is subject to a tensile force of 200 lb. Determine the average normal and average shear stress in the wood fibers, which are oriented along plane a-a at 20 degrees with the axis of the board.
Allowable shear stress
Переглядів 9 тис.5 років тому
Determine the maximum magnitude P of the loads the beam can support if the average shear stress in each pin is not to exceed 80 MPa. All pins are in double shear, and each has a diameter of 18 mm.
Average shear stress
Переглядів 10 тис.5 років тому
If P=5kN, determine the average shear stress in the pins at A, B, and C. All pins are in double shear, and each has a diameter of 18mm.
Reaction and internal forces (Part 2)
Переглядів 2145 років тому
A beam is roller supported at A and pin-supported at B. The beam is subject to a counter clockwise moment at A, a distributed load on span AB, and a point load at C. a. Calculate the reaction forces at A and B b. Calculate the internal forces at mid-span of AB
Reaction and internal forces
Переглядів 6115 років тому
Statics and Mechanics of Materials A beam is roller supported at A and pin-supported at B. The beam is subject to a counter clockwise couple moment at A, a distributed load on span AB, and a point load at C. a. Calculate the reaction forces at A and B b. Calculate the internal forces at mid-span of AB
great video, my book didn't mention the relation between negative/positive acceleration and -ve/+ve deceleration but this video cleared my doubts
I fucking love you so much for this up to the point that if I were into men I'd marry you
Thank you so much!!! You explained this very clear and much better than my instructor!!
So clear and precise thank you sm!!!!
great
E=28571428 psi in the video lecture means that the sample in question will break apart at this pressure?
What is the difference between Young's Modulus and the Elastic Modulus?
its the samething just different names
I don't understand why the area is 1/4 pi r ^2. Can someone explain why there's a 1/4 please?
Area of circle is pi/4 *diameter²
Thanks,fantastic explanation
If you still reading comments, thank you!
How did you find the area for the average shear stress equation?
this looks really cool. I wish I took differential equations in college. probably would've helped me make more money in my career
I LOVE THIS COMMENT. DOING BCOM IN ECONOMICS AND STATISTICS , I WISH I DID THEM
So helpful and easy method. Thank you 💗
you’re very intriguing!
I am from Malaysia. Thank you the videos very helpful :)))
Thank you sooooooo much this helped a TON.
This video is highly underrated. Simple explanation that cleared up so much confusion so me. Thank you 😊
Thank you for the video! it helped a lot!
Please is it a gradient
can you work 3-5?
thank you so much!!
When finding moment at A, why does distance Fcb not required?
Hi Good day, do you have an email? I have a problem that I would love for you to solve and explain it here in your channel. It's about Mechanics of materials. You make every problem very clear and easy to understand. Thank you!
Awesome keep up the great work, your explanation is very clear Thanks a lot. Blessings!!!!
could you tell me the cross sectional area formula if the given is 2 force. 160 Kn and 150 N/mm^2?
I Subbed nice work mate keep It up. My Problem was when I was calculating the moment I summed 30P. (was the first equation I started with). And I was lazy so I used 30P with X and Y equations as well.
this was a big help thank you!
why didn't the y cause the sheer and the x cause the normal?
I think it is because of the definition. Normal is perpendicular to the surface while shear is parallel to it
really helpful! thanks
Great! An excellent job and thank you for the explanation
Why is the force from member BA not considered when calculating the shear stress for pin B?
This is a Godsend. I was so lost until now
Thank god I found this video. Directions where very clear 👍
Honestly explain perfectly
What if I dont have the Ao and lo
when you were calculating in your calculator did you forget to square the .7?
A little late but I hope it helps, but you dont actually square it as its inches squared which is a unit of area, you cancel out the 5 and .002 which are both measured in inches and leave lb/in^2 which leaves you with the end result of 28571428 PSI, as in pounds per square inch.
Thank you ! I have a question though, when the car is having an negative acceleration, it means that the car is speeding up with the velocity and acceleration in the same way but just in the other side of the reference system ?
Basically the same exact thing in the other direction
Straight to the point clear and concise! great video.
Thanks, it helps me to my project
Car is slowing down toward right so deceleration should be -ve.car is slowing down towards left so deceleration should be +ve
Nice ☺️
Thank you so much! That helped me understand
Thank you so much for the video, it was very helpful.
Thanks
Thanks
You saved my life ♥️ thanks
Thank you so much for the video.
you're the best!!!!!
That was very helpful!!
Wouldn't FCB in x be 4/5*CB instead of 3/5*CB? Video was very helpful! Thank you!
i need a video with conversations ): this was my exact problem except instead of kips it was kN and instead of in its mm