moment of inertia

a small brief

the moment of inertia describes how difficult to change the state of a body "stop it from moving , change its direction or start moving it"

this is the general idea

it depends on the mass , the shape and the mass distribution "homogeneousity" of the body

this effects the acceleration , angular acceleration , velocity , angular velocity of the body when a force is applied on it

we can also use it in studying strength of materials to determine thickness and shape of mechanism elements

How it is calculated for any mechanism what are the parametersneeded to be considered.

This is a link that gives a good explanation:

http://en.wikipedia.org/wiki/Moment_of_inertia

Greg

I could be wrong but this is starting to look suspiciously like a series of high school science homework questions.

Another suspicious possibility.

Since the OP Guest here, and in his previous thread asking about the law of conservation of energy seems interested in these related topics, the "5X the torque for the same electrical energy input" claim of the hummingbird motor leaps to mind. Since these free energy technologies violate physical laws:

http://www.befreetech.com/feinfo.htm

http://www.everwatt.com/

There are many free energy and perpetual motion websites claiming all manner of things but offering no proof at all.

Just looked at befreetech and I think the guy should be locked up.

The other site wouldn't open.

I agree 100%

If you read enough on the site, you'll see he was locked up but he tries to use that to his advantage: the powers that be are opposed to his free energy and will stop at nothing.

I was just able to open the second one.

A body resists any change in its velocity with a force equal to its mass multiplied by the rate of change of velocity (Newton's law). This also means a solid body will also resist any change in spin velocity about any axis; because each point mass within it is forced to change its motion. The degree to which it resists such change is called its moment of inertia about the axis. However as different portions suffer different changes in motion, this value of moment of inertia will depend on the distribution of mass inside the body.

I think Masu may be correct, or elementary college physics for teaching majors.