I made this change in a few places-- rename of method names. In the case that a method has a return value, like this one, I find the code more understandable if the method name reflects that, like  "calculateBla" or "getBla". When I see "drag", it sounds like it is a function with side effects but no return value.
This is a personal preference based on a Java-based childhood so there's nothing I can point at to justify one way versus the other.