Two Degrees of freedom System- Equations of Motions-part 1

[@waqarali1428]

Thank Youuuuu Very Much Dude. You can't imagin what you have done for me. You solved my biggest confusion and boost me up to study Mechanical Vibration♥️

[@BahaAlMasri]

Thank you! This video was very helpful to me you've detailed how to get the equation while in the book this was not detailed fair enough.

[@PhionaSibisi-ve3zw]

This is lit, thanks man

[@guttualemu2846]

Manuplation

[@darkmaster323]

For mass 2, the equation doesn't have k1 .

[@hoabang1721]

cho em hỏi xíu - tại sao lúc đầu khi vẽ giản đồ lực lại không thấy có trọng lực tác dụng lên m1 và m2 vậy ạ 3:55

[@vivekkamatabcdefg]

Equation 2 is wrong. For mass 2 k1 is not there

[@viswanthramba3786]

Sir, in case of 10 pipes connected in series and are hanging from the top, what is the type of motion that we need to consider if the pipes possess elasticity & what is the value of "K" that we need to consider?? Can u kindly help me out with this. Thank you

[@Amr.El-Brol]

what is name of program which use in write ?

[@EngineeringHelp]

i am using Samsung S note app

[@laserbean00001]

What app are you using?

[@EngineeringHelp]

Samsung tablet that has the spen note app

[@laserbean00001]

@@EngineeringHelp oh yeah it is. I'm just looking for a good app to write on pdf. Samsung's "write on pdf" is the only good one i can find. But it has limited functionality.

[@Alaa_Mansour_N]

Thank you 🙏

[@hoabang1721]

where is gravitational force ? do I miss something ?

[@shahrinnakkhatra2857]

Why is that (x2-x1) , not (x1-x2)? I'm also having problems with the directions

[@EngineeringHelp]

what you do is you subtract the second coordinate that is pointing in the direction of motion from the coordinate that is behind it. so in this example in the video x1 is behind x2 since the direction of motion is acting downwards. hence x2- x1.

[@EngineeringHelp]

for directions, its simple the x1 coordinate system is acting downward which means the motion is also in that direction which also means its the positive direction and anything opposite to it is negative x direction. same for the x 2 coordinate system. thanks for watching

[@shahrinnakkhatra2857]

Another question, if the end of the second mass isn't free, and another spring with spring constant s3 or k3 is added behind it, then the equation stands: -s2(x2-x1)-s3x2... i don't understand this...

[@EngineeringHelp]

then mass 3 would have an x3 coordinate and based on that it will be k3(x3-x2)

[@EngineeringHelp]

simply think of it this way the front coordinate minus the behind coordinate assuming the direction of motion is in that direction

[@mz-by4gh]

Thank u

[@arifkhan-yx9et]

equation 2 is Wrong. There's no K2.