my querry is just that [b]which force is responsible for energy transfer across string ?
obviously it should b tension[/b] but as i said while calculating vel of a wave using [b]newtonian mechanics we consider net force on that element [/b] n to do that we resolve the two tensions into horizontal n vertical component........
the tensions in horizontal (opposite direction)cancel each other n therefore the net is in the vertical direction............i donno if u got my doubt .......