Relative Velocity Concepts

A stationary observer will observe a car and its passengers traveling at different velocities.

All of these statements are accurate.

Relative to a stationary observer, the velocities of objects moving in the same direction are subtracted from each other to determine their relative velocity.

Relative to a stationary observer, the velocities of objects moving in opposite directions are subtracted from each other to determine their relative velocity.

If an observer and an object are traveling at the same velocity, their velocity relative to each other is not zero.