Final answer:
Additional geometric details are required to complete a proof of congruence between triangles STU and RVU in an equilateral triangle RSU. The provided information includes irrelevant physics concepts that cannot aid in a geometric proof.
Step-by-step explanation:
To solve the given problem in equilateral triangle RSU, we must use the properties of equilateral triangles and congruence postulates in geometry. However, additional information is required to complete this proof since the question mentions triangles STU and RVU which are not standard notations for parts of equilateral triangle RSU.
Additionally, this problem contains mixed information seemingly related to physics, such as charges and vectors, which are not relevant to a geometric proof. Therefore, without the correct geometric details or a specific congruence postulate or theorem to apply, we cannot provide a step-by-step explanation for this proof.