1. The problem statement, all variables and given/known data A solid sphere of mass m=2 kilogram and specific gravity s=0.5 is held stationary to a tank as shown in figure. The tank is accelerating upward with a=2ms-2. calculate the tension in the string? If suddenly string break then the acceleration of the ball in frame of tank. 2. Relevant equations Archimedes principle 3. The attempt at a solution see in attachment. for second question. My answer is net force =B-mg=20 so acceleration in frame of ground is 10. In frame it should 10-2=8.