2 which two of the following are necessary for determining the velocity of an object? a direction b inertia…

Brief Explanations:

Velocity is a vector quantity. A vector quantity has both magnitude and direction. The magnitude of velocity is speed. So, to determine velocity, we need to know the direction (to specify the vector aspect) and speed (the magnitude of the velocity vector). Inertia is related to an object's resistance to change in motion and is not directly used to determine velocity. Mass is used in concepts like momentum ($p = mv$) but not directly for velocity calculation. Momentum also requires mass to find velocity ($v=\frac{p}{m}$), but the fundamental components for velocity itself (without involving other quantities like mass) are speed (magnitude) and direction.

Answer:

A. Direction, E. Speed