# Velocity FAQs:

Q: Is velocity equivalent to a specification of its speed and direction of motion?

A: Yes, Velocity is an important concept in kinematics, the branch of classical mechanics that describes the motion of bodies.

Q: Is velocity always less than or equal to the average speed of an object?

A: Yes.

Q: Is velocity a physical vector quantity?

A: Yes, both magnitude and direction are needed to define it.

Q: Is velocity a measurement of velocity between two objects as determined in a single coordinate system?

A: Yes.

Q: Is velocity called "speed", being a coherent derived unit whose quantity is measured in the SI system as metres per second or as the SI base unit of?

A: Yes, For example, "5 metres per second" is a scalar , whereas "5 metres per second east" is a vector.

Q: Is velocity defined as the rate of change of position with respect to time?

A: Yes, and which may also be referred to as the instantaneous velocity to emphasize the distinction from the average velocity.

Q: Is velocity independent of the chosen inertial reference frame?

A: Yes.

Q: Is velocity calculated by only considering the displacement between the starting and the end points while the average speed considers only the total distance traveled?

A: Yes.

Q: Is velocity the component of velocity along a circle centered at the origin?

A: Yes.

Q: Is velocity the minimum speed a ballistic object needs to escape from a massive body such as Earth?

A: Yes.

Q: Is velocity fundamental in both classical and modern physics?

A: Yes, and since many systems in physics deal with the relative motion of two or more particles.

Q: Is velocity defined as the rate of change of position?

A: Yes, and it is often common to start with an expression for an object's acceleration.

Q: Is velocity zero but its average speed is found by dividing the circumference of the circle by the time taken to move around the circle?

A: Yes.

Q: Is velocity measured in metres per second?

A: Yes, Although the concept of an instantaneous velocity might at first seem counter-intuitive, it may be thought of as the velocity that the object would continue to travel at if it stopped accelerating at that moment.

Q: Is velocity the dot product of the velocity vector and the unit vector in the direction of the displacement?

A: Yes.

Q: Is velocity that of the cross product of the unit vector in the direction of the displacement and the velocity vector?

A: Yes.