- #1
sergiokapone
- 302
- 17
Homework Statement
Three identical charged balls of mass m and charge q bound in a triangle thread length l. One of the strands break. Calculate the acceleration of the middle ball at the initial moment.
2. Relevant equation
a. Newton's laws
##m\vec a_1 = \vec F_{12} +\vec F_{13} + \vec T_{13}##
##m\vec a_2 = \vec F_{21} +\vec F_{23} + \vec T_{23}##
##m\vec a_3 = \vec F_{31} +\vec F_{32} + \vec T_{31} + \vec T_{32}##b. Constraint Equations
##(\vec r_1 -\vec r_2)^2 = (\vec r_1 -\vec r_3)^2 = const##
c. May be relations between ##\vec r##-vectors in CM-system
##\vec r_1 +\vec r_2+\vec r_3=0 ##
The Attempt at a Solution
The unknown T-forces should to be exluded using Constraint Equations, but what to do with it, I have no idea.