An art piece consists of two metal balls suspended from a lightweight rod fixed by a string to the ceiling, as shown in the picture below. The numbers above the rod represent the relative lengths of each side of the rod on either end of the string attaching it to the ceiling. Adequate The diagram contains no errors and each force is labeled so that it is clearly understood what each force represents. 0.6 k If the mass of the metal ball on the left is 0.6 kg and the mass of the rod is negligible, determine the mass of the ball on the right and the force the top string exerts on the ceiling. Explain your process. 2 Adequate Mathematical procedure is fully consistent with the design. All quantities are calculated correctly with proper units. Final answer is meaningful. Adequate Explanation is clear, detailed, and shows physical and conceptual understanding. Explains both what was done and why. 3 Ability A5: Is able to construct a force diagram Needs Work Inadequate FD contains no errors in vectors but lacks a key feature such as labels of forces with two subscripts or vectors are not drawn from single point, or components are drawn instead of forces. FD is constructed but contains major errors such as incorrect mislabeled or not labeled force vectors, length of vectors, wrong direction, extra incorrect vectors are added, or vectors are missing. Ability D7: Is able to choose a productive mathematical procedure for solving the problem Needs Work Inadequate Correct and complete mathematical procedure is described but an error is made in the calculations. All units are consistent. Explanation is slightly unclear, missing some minor information, covers what was done but is missing why it was done. A mathematical procedure is described, but is incorrect or incomplete, due to which the final answer cannot be calculated. Or units are inconsistent. Missing No representation is constructed. Ability F3: Is able to clearly explain their reasoning in words Needs Work Inadequate Explanation is incoherent, incomplete, confusing, or inconsistent with the work shown. Missing Mathematical procedure is either missing, of the equations written down are irrelevant to the design. Missing No verbal explanation is provided.