what is the difference between velocity & relative velocity.?

Answer 1

Velocity relates to the speed and direction of an object. Relative velocity is a measurement of velocity between two objects moving in different frames of reference

Answer 2

The ground velocity (or ground speed) is the velocity of the aircraft relative to the ground, whereas the air velocity (usually just called airspeed) is the velocity of the aircraft relative to the air (which itself could be moving relative to the ground). If there is no wind, the two will be the same, but if the wind is blowing (as it nearly always is, and is in your question), the airspeed will differ from the ground speed by the amount the wind is blowing. For example, if the plane is flying straight east with an air speed of 400 km/h and the wind is blowing from the west (i.e. the air is moving to the east) at 20 km/h, the aircraft will have a ground speed of 420 km/h. Winds at high altitudes almost always blow primarily west to east, but aircraft fly based on airspeed not ground speed. That's why a flight going west usually takes longer than the return flight along the same route back east. Generally speaking, the "ground velocity" does not include any vertical components of the total velocity, so if the aircraft is climbing, you'll need to use some trigonometry to separate out the vertical and horizontal components. Now that you know that, if you need help figuring out how to do the calculations, let me know.

Answer 3

Our modern understanding is that there really is no difference. That is, ALL velocity is relative.

This is another way of saying: The velocity of an object depends on the reference frame (the "point of view") from which you measure it. The measured velocity will have different values as seen from different reference frames, and no measurement is any more "correct" than another.

For example, suppose you are in a train that is moving at 40 mph, and John, a passenger, walks toward the front of the train, with a walking speed of 3 mph. What is John's velocity?

Relative to the other passengers, John's velocity is 3 mph. Relative to the an observer standing on the ground, John's velocity is 43 mph. Relative to the center of the earth, John's velocity is about 800 mph, and relative to the center of the sun, John's velocity is about 18 miles per second.

All of these values are equally "correct." It just means that if you are to make some statement about a thing's velocity (or about other quanities that depend on its velocity), you must specify (or implicitly understand) which reference frame you're using.

Answer 4

Velocity is technically always relative to a given reference frame, so the two descriptions have more to do with common usage. If the reference frame is implied as, say, the lab frame, then saying "relative velocity" would be redundant and result in confusion. "relative velocity" is usually only used when two things are explicitly cited. For example, airspeed is defined as the magnitude of the relative velocity of an airplane with reference to the air it's flying through. Here, both the plane and the air are cited.

Answer 5

The difference between velocity and relative velocity is the difference between B student and A student.

B student knows how to calculate velocity.
A student knows that all velocities are relative.

Answer 6

Velocity Refers to the motion of a body in space.
If the velocity of one body is measured from the zero point of measurement,then the body velocity is said to be relative to that point of measurement.
If body A velocity is relative to reference frame 0, and body B velocity is measured also relative to frame 0. Then body A velocity and body B velocity are both relative to the same frame of reference.

Therefore it is postulated that if two bodies are moving relative to the same frame of reference, they are indeed relative to each other.
For example; if a moving source of light is measured from a zero point of reference that gave it its motion,and a micromass particle is emitted from the source ,therere is a relativity between the light and the source.
ILet Vs =velocity of light source,and Vr = the relative velocity between the micromass of light and its source.
C=speed of light relative to the same reference point of measurement as the moving source.

RELATIVE VELOCITY OF LIGHT AND SOURCE;

Vr = C minus Vs
Vr=C-Vs
Therefore all motion is really relativistic regardless of the magnetude of velocity.

I hope this simple explanation , without going into the Theory of Relativity,would help understanding the relative velocity of a moving masses.

Answer 7

velocity is the rate of an object. relative velocity is the rate of an object as observed from another moving reference frame.