Mechanical Vibrations 8 - Newton 2 - Double Mass-spring-damper system

[@nebster333]

Been worried since last night about not understanding how the arrows in the FBD corresponds to if we are taking (x1-x2) or (x2-x1). I finally understood. Thank you so much!! This made me so happy :D

[@javedmalik1922]

Me too 🎉

[@ethanboba5262]

me too 🎊

[@moadibnasir2526]

I have been freaking boiling my mind over past 2 hours and you just explained in 11 minutes woww.. love you

[@ajj7794]

i love u, ty soo much for these videos !!!!! make more haha, it would be very much appriacated.

[@lucavisconti1872]

Thanks for this nice video. A question: If you have assumed that the mass M2 does not move (2:55), then why We should have Fs3 and Fd3? the spring 3 should be in rest (neither compressed nor elongated), unless it was already preloaded.

[@cgr3955]

Great question. I think he said it to make understanding better, but it is not exactly correct, actually we assume that x1>x2, therefore spring is in compression. Also x1_dot > x2_dot is the assumption for damper eqns.

[@VikiJoker1924]

How are the forces on left side for mass 2 acting towards the mass? Shouldn't it be the other way?

[@VikiJoker1924]

Is it because when M1 moves to the right, it compresses the k2 and d2, which causes the spring and damper to exert a force on both the sides, ie force on the left and right?

[@jakobsime4190]

Right??? Thats what makes sense to me.

[@cgr3955]

thanks, very clearly explained:)

[@MShazarul]

I don't get the reaction forces in M2 especially the LHS of M2. Edit - Always use the reaction force when trying to establish the equation hence the equation for the second mass is wrong. It 's opposite.

[@bibinkunjumon]

very best explanation

[@akiladinith7433]

Thanks man ❤️❤️you save me

[@diegocastro1666]

Thank you so much

[@bedirhanarslan6873]

Sir why the fs2 and fd2 has positive direction?

[@gregorytierney3274]

Do you have MATLAB code to solve this?

[@johnclarke7960]

Thank you so much man

[@adityamahamuni9612]

can you prepare the pdf of all of this and upload this in description please ?

[@dinithisahanika7823]

❤