Is f in P = FV a resultant force? So why does P = f pull v when moving at a constant speed?

Is f in P = FV a resultant force? So why does P = f pull v when moving at a constant speed?

F in P = FV is not necessarily a resultant force, it may be a force. It corresponds to power P, that is, power P is the power of any force, and f refers to any force. For example, if P is the power of pulling force, f refers to pulling force; if P is the power of friction force, f refers to friction force