Define and give an example of inertia?

Answer 1

The inertia of the earth is just what you think it is. Anything moving wants to keep moving. (Just like anything at rest wants to remain at rest.) The earth is spinning on its axis. (And it isn't perfectly round.) It has that kind of inertia. It is moving through space in orbit about the sun, and has an inertial moment associated with that. The sun is moving, and that imparts another inertial component to the earth. And the Milky Way Galaxy is moving carrying the earth with it. More inertia. There are also a couple of other little weird types of inertia that should be looked at to find a total inertial moment for the earth, if one is so inclined. They have to do with slight changes in the "direction" the axis of rotation points. Good luck working something out with them. Oh, and almost forgot. There's this matter of liquid water sloshing around on the earth, too. That'll really increase the difficulty of your calculations. Plus, the earth isn't a "solid" sphere, liquid water aside. Bummer. Sorry if I ruined your day, but you did ask. In concluding, the inertia of the earth is the vector sum of, or, if you prefer, something like the "cumulative effect" of all the various motions associated with this big ball of spinning, wobbling, rotating, drifting and shape-changing material on which we live. Links are provided below to get you started. Good luck.

Answer 2

inertia is force of matter. It's the force to go forward. For example, earth rotates around the sun. with out inertia, earth would not go around the sun. It would go straight into the sun, because of gravity. Also, it is like throwing a ball. without Inertia, the ball would just fall to the ground, not go forward.

Answer 3

to push an object such as a broken down car in order to start or to move it to the side of the road.There is a tendency to resist the motion, such a tendency is called inertia-the more mass they have the greater their inertia.

Answer 4

The definition of the term inertia is a tendency to do nothing or remain unchanged. It is also a property of matter that continues in its existing state of rest or uniform motion unless the state is changed by a force.

Answer 5

Inertia is the force push against something when another thing is in motion. For example if I threw a ball force is put on the ball and with the help of gravity the ball comes to the ground. The 3 basic laws of motion that Isaac newton discovered covered the laws and explanation of motion and inertia

I. Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.

II. The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector.

III. For every action there is an equal and opposite reaction.

Answer 6

The rotational kinetic energy of a rigid body can be expressed in terms of its moment of inertia. For a system with N point masses mi moving with speeds vi, the rotational kinetic energy T equals

where ω is the common angular velocity (in radians per second). The final expression I ω2 / 2 also holds for a mass density function with a generalization of the above derivation from a discrete summation to an integration.

In the special case where the angular momentum vector is parallel to the angular velocity vector, one can relate them by the equation

where L is the angular momentum and ω is the angular velocity. However, this equation does not hold in many cases of interest, such as the torque-free precession of a rotating object, although its more general tensor form is always correct.

When the moment of inertia is constant, one can also relate the torque on an object and its angular acceleration in a similar equation:

where τ is the torque and α is the angular acceleration.

Answer 7

Resistance to acceleration or deceleration. Otherwise quantified as "mass". A mass will not move (or if already moving, change its speed) unless there is a net force applied to it. On a perfectly smooth, flat horizontal table a mass will not move until a force is applied, and the bigger the force, the bigger the acceleration. Force=mass x acceleration. A falling mass falls because of the force of gravity. Again, force = mass x acceleration. In this case the force itself (gravity) is proportional to the mass, so the acceleration (ignoring air resistance) is always the same (for us on Earth) independent of the mass of the object. If you do have air resistance, then this force is in the opposite direction to the direction of fall, and increases with speed, so eventually it balances the gravitational force and there is no further acceleration (having reached the "terminal velocity").

Answer 8

Inertia is the tendency of an object to resist any change in its motion.

Answer 9

the property of matter by which it retains its state of rest or its velocity along a straight line so long as it is not acted upon by an external force

Answer 10

Inertia can be defined as the property of a body that makes it oppose any force that would cause a change in its motion.