Weights on a string problem -- is this right?? Hello all, I'd appreciate it if anyone can check whether I have the right approach to this problem: "Two weights, A and B, are connected by a string. Weight A weighs 0.7 kg, and B weights 0.8 kg. If A is raised vertically upward with a force of 30N, (1) what is the acceleration of weights A and B? (2) what is the tension of the string?" First of all, the downward force of weight A is (0.7kg)(9.8m/s2) = 6.86F, and that of B is (0.8kg)(9.8m/s2) = 7.84N. Therefore, I guess the net force would just be 30N - 6.86F - 7.84N = 15.3N. Since the 2 weights are connected by a string, I assume they have the same acceleration. If so, using F = ma, the accerlation of both would be a = 15.3N/1.5kg = 10.2m/s2. Since tension, T, =ma, this should be 15.3F too. Correct? Thanks in advance.