Solved: In the vertical direction we have two forces.
Chapter 12, Problem 12.1.31(choose chapter or problem)
In the vertical direction we have two forces. namely, the vertical components - T] sin ll' and T2 sin f3 of Tl and T2; here the minus sign appears because the component at P is directed downward. By Newton's second law the resultant of these two forces is equal to the mass p ~x of the portion times the acceleration a2 uICJ(2, evaluated at some point between x and x + ~x; here p is the mass of the un deflected string per unit length. and ~x is the length of the portion of the undeflected string. (~ is generally used to denote small quantities; this has nothing to do with the Laplacian V2, which is sometimes also denoted by ~.) Hence
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer