HI Guys! Please help me in solving this simple problem. Im getting an answer which is not matching with the answer given in my book. The problem is: "TWO SMALL HELIUM FILLED BALLONS, TIED TO A 50gm WEIGHT FLOAT IN EQUILIBRIUM.(TOTAL FORCE ON EACH BALLOON IS ZERO). EACH BALLOON HAS A CHARGE "Q". FIND "Q". See attached fig also: now i have tried it many times. what im confusing that suppose i take one ballooon under consideration. Then the force that is exerted by the second balloon on the first one and the force exerted by the 1st on the second will cancel each other. so there would be no expression left with the term "Q". Please help me, i have a very short time. Thanks in advance!