Inertia vs. Gravity — What's the Difference?

Inertia is the resistance of any physical object to any change in its velocity. This includes changes to the object's speed, or direction of motion.

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.

A tendency to do nothing or to remain unchanged

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

A property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force

Extreme importance; seriousness

(Physics) The tendency of a body at rest to remain at rest or of a body in straight line motion to stay in motion in a straight line unless acted on by an outside force; the resistance of a body to changes in momentum.

Solemnity of manner

Resistance or disinclination to motion, action, or change

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

The property of a body that resists any change to its uniform motion; equivalent to its mass.

See gravitation.

(figuratively) In a person, unwillingness to take action.

Grave consequence; seriousness or importance

(medicine) Lack of activity; sluggishness; said especially of the uterus, when, in labour, its contractions have nearly or wholly ceased.

Solemnity or dignity of manner.

That property of matter by which it tends when at rest to remain so, and when in motion to continue in motion, and in the same straight line or direction, unless acted on by some external force; - sometimes called vis inertiæ. The inertia of a body is proportional to its mass.

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

Inertness; indisposition to motion, exertion, or action; lack of energy; sluggishness.

The state or condition of being grave; seriousness.

Lack of activity; sluggishness; - said especially of the uterus, when, in labor, its contractions have nearly or wholly ceased.

(music) The lowness of a note.

A disposition to remain inactive or inert;

(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.

(physics) the tendency of a body to maintain is state of rest or uniform motion unless acted upon by an external force

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

(physics) Specific gravity.

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

Sobriety of character or demeanor.

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