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Sorry if this question doesnâ€™t make sense but Around 10:20, why did you subtract delta x2 from from delta x1 if the force Fx1 and Fx2 are not same/equal? Again sorry for my poor english.

Hey @Subashs29,

We subtract the delta_x2 from delta_x1 because itâ€™s the displacement at node â€˜iâ€™ weâ€™re interested in (when considering the first equation), so we need to remove the influence of the displacement at node â€˜jâ€™ since this is captured in the second equation when considering the displacement due to F_x2.

Feel free to follow up if youâ€™re still not clear.

S