P. 4591. There are 4 positively charged small balls of mass m at the vertices of a regular tetrahedron of edges L. The balls are connected with insulating threads of negligible mass. Three balls have a charge of Q, and the fourth is charged to 2Q.
a) At the same instant the three threads which connect the charge of 2Q with the others are cut. Determine the initial acceleration of the balls at the instant when the threads are cut.
b) To what speed will the balls accelerate?
Deadline expired on 10 January 2014.