Mechanical Engineering: Ch 10: Forces on Cables (8 of 33) Concentrated Load: Example (Part 1)

In this video I will calculate the various force acting at different points of a cable with concentrated load (Part 1).

Next video in this series can be seen at:

[johndaveleones]

You are a very good educator. I can easily catch up to your discussions.Thank you for being born in this world. Please make lots and lots of videos like this. ❤

[mukisajoshua]

You're a world treasure. From Uganda

[nathannguyen]

Thank you so much. Your handwriting and the way you explain make easy for me to understand.

[ngogaemile]

why not calculating moment at D to the left so we can get Ay easily?

[mazinabdulkadhim]

Deer Sr. I have a question, please, if there is a cable suspended between two pins say point A & E, and point E vertically little higher than A loaded with two unequal weights w1 > w2 at point B & D respectively and there is a pulley at point C between B & D and at a hight between A & E, and assume the cable is long enough, will the system have two sags at B & D or one sag only at point B due two the higher weight?. waiting for your reply. Thank you.

[kjca]

First i get the moment at A getting the Ex & Ey unknowns. Second i did a moment at D (to its right) leaving Ex & Ey as unknowns. Solving both Ex and Ey wont match with yours. Whyy is that? :(( Does it vary on where u get the moment? Any tips if so?

[kiyingicharles]

How comes when you try to take moments at point D, you get a different result?

[darlingtonOfficial]

I have a question, when calculating moment, we use negative sign when force is turning clockwise?

[omarmashadov]

Sir appreciate for the video. You said that when considering moments at point C we can take one side if its cable, is it because they dont have bending moments like rigid structures? Kindly respond pls

[comedyfromafrica]

Hi, upon using point D as my pivot, I found we can eliminate Ax and find Ay. But The Ay I calculated doesn't correlate with your answer. Any reasons?

[ngogaemile]

I tried to calculate moment at point D, I got different result. I thought in cable we calculate moment at any point.

[yamushakasaka]

Hi Michel!. i got your example but, i do not if can you performance an exercise with just 2 Forces with their respective masses, Greetings!

[jomarkintelmoso]

Very good teacher, thank you very much

[hamzasebbiali]

the direction of the moment of Ax at C still confuses me. how comes its different from that at point E

[lazuli]

I think the Ay in the first equation should be negative since it goes clockwise when getting Moment at E

[iconbylvergara]

When taking the moments at point C, why do we get to calculate only the moments on the left side?

[nhlanhlamalindisa]

the 1m vertical distance is infact Not from point C to D but rather from point C to the origin! missed that at first.

[batuhanatc]

I think the methodology youre doing makes sense but there is something wrong with the question. Are you sure that is a stable system ? Because when I choose a different pivot point it always gives a different answer for the x and y components of force at A. For example by taking D as a pivot point. Total moment about point D=0,  A_x is gone because the perpendicular distance is 0. So we only have A_y and it turns out to be 14.666 N. Could you please check the question bec I have an exam tomorrow and Im pretty confused. Thanks :)

[guycollishaw]

This is driving me crazy, i'm given the sags and distances but i'm expected to find d. Can't find an example anywhere.

[ayeshanoor]

When moment about C=0..Why Ax is counter
Clockwise?? However Ax was clockwise when Moment about E =0