Final answer:
The value of potential energy (PE) cannot be determined from the given information that kinetic energy (KE) equals 5. The conservation of mechanical energy principle suggests that PE could be any value depending on other factors not provided.
Step-by-step explanation:
If KE equals 5 (presumably in units of energy), the question asks for the value of PE (potential energy). Without additional information, like the initial PE or any changes that occur between these energy states, we cannot definitively solve for PE. However, using the conservation of mechanical energy principle, which states that in the absence of non-conservative forces like friction, KE + PE remains constant in a system (KEi + PEi = KEf + PEf), we can interpret that if KE has a fixed value and no information is provided about changes in energy, the PE in question cannot be determined without further details.