Meaning of relative direction. Relative definition, a person who is connected with another or others by blood or marriage. See more. What does relative mean..!! What is Friction in Physics? If someone could give me a very simple explanation, it would be appreciated. I still don't understand the meaning of relative. I just started learning about vector components and relative motion. We introduce relative motion in one dimension first, because the velocity vectors simplify to having only two possible directions. A rigid body is an extended object that doesn't flex, such as a boomerang. Relative velocity in two dimensions. Friction Definition Physics: A force acting on the point of contact of the objects, which opposes the relative motion is called friction. I don't understand what relative to something means. HelpYouBetter » Physics » One-Dimensional Motion » Relative Velocity – Concept, Definition, Formula, Problems, Examples. In this article, we are going to discuss the concept, definition and formula for relative velocity with the help of solved problems and examples. For example, a boat crosses a river that is flowing at some rate or an aeroplane encountering wind during its motion. Relative Motion in One Dimension. Thus, the motion is not calculated with reference to the earth, but is the velocity of the object in reference to the other moving object as if it were in a static state. Relative Velocity: We encounter occasions where one or more objects move in a frame which is non-stationary with respect to another observer. | Definition, Examples, Types of Friction – Laws of Motion. General relativity is concerned with gravity, one of the fundamental forces in the universe. I looked online but none of the explanations are helpful. Definition of relative direction in the Definitions.net dictionary. I cannot breach onto the concept of Einstein's Principles of Relativity without knowing the meaning of it!!! What does relative direction mean? RELATIVE MOTION When we talk about the velocity of something we first determine a reference point and then according to this reference point we say the velocity of the object. This is a consequence of the translational invariance of the laws of physics: nature, loosely speaking, behaves the same no matter what direction one moves. Relative motion is the calculation of the motion of an object with regard to some other moving object. Take the example of the person sitting in a train moving east. Specific gravity for liquids is nearly always measured with respect to water at its densest (at 4 °C or 39.2 °F); for gases, the reference is air at room temperature (20 °C or 68 °F). When the truck is next to the bus you feel that as you go backward to the west Special relativity is limited to objects that are moving with respect to inertial frames of reference. Relativity, wide-ranging physical theories formed by the German-born physicist Albert Einstein. Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. For example, you are in a bus and it goes with the velocity of 50 m/s to the east, then a truck passes you with a velocity of 60m/s to the east. Relative acceleration is the mathematical comparison of two object's accelerations, or for two points on a rigid body.