Gravity vs. Friction — What's the Difference?

Gravity (from Latin gravitas 'weight'), or gravitation, is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light—are attracted to (or gravitate toward) one another. On Earth, gravity gives weight to physical objects, and the Moon's gravity causes the ocean tides.

Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact.

The force that attracts a body towards the centre of the earth, or towards any other physical body having mass.

The resistance that one surface or object encounters when moving over another

Extreme importance; seriousness

The rubbing of one object or surface against another.

Solemnity of manner

Conflict, as between persons having dissimilar ideas or interests; clash.

The natural attraction between physical bodies, especially when one of the bodies is a celestial body, such as the earth.

(Physics) A force that resists the relative motion or tendency to such motion of two bodies or substances in contact.

See gravitation.

The rubbing of one object or surface against another.

Grave consequence; seriousness or importance

(physics) A force that resists the relative motion or tendency to such motion of two bodies in contact.

Solemnity or dignity of manner.

Massage of the body to restore circulation.

The state or condition of having weight; weight; heaviness.

(figuratively) Conflict, as between persons having dissimilar ideas or interests; clash.

The state or condition of being grave; seriousness.

(Second Sino-Japanese War) Conflict, as between the Communists and non-Hanjian Kuomintang forces.

(music) The lowness of a note.

The act of rubbing the surface of one body against that of another; attrition; in hygiene, the act of rubbing the body with the hand, with flannel, or with a brush etc., to excite the skin to healthy action.

(physics) The force at the Earth's surface, of the attraction by the Earth's masses, and the centrifugal pseudo-force caused by the Earth's rotation, resulting from gravitation.

The resistance which a body meets with from the surface on which it moves. It may be resistance to sliding motion, or to rolling motion.

Gravitation, the universal force exercised by two bodies onto each other.

A clashing between two persons or parties in opinions or work; a disagreement tending to prevent or retard progress.

(physics) Specific gravity.

A state of conflict between persons

The state of having weight; beaviness; as, the gravity of lead.

The resistance encountered when one body is moved in contact with another

Sobriety of character or demeanor.

Effort expended in rubbing one object against another

Importance, significance, dignity, etc; hence, seriousness; enormity; as, the gravity of an offense.

The tendency of a mass of matter toward a center of attraction; esp., the tendency of a body toward the center of the earth; terrestrial gravitation.

Lowness of tone; - opposed to acuteness.

(physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface;

A manner that is serious and solemn

A solemn and dignified feeling