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gunblaze
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What really is INERTIA?
Is it a force.?
A vector or a scalar?
What can be known only by the defination?
Does it really have anything to do with physics?
Oh, is that what the "a" stands for in that equation? Yeah, I knew that - fixed now.Chi Meson said:Russ:
The high school teacher in me comes out; Inertia is the resistance to change in motion. I know you know that.
gunblaze said:
What really is INERTIA?
Is it a force.?
A vector or a scalar?
What can be known only by the defination?
Does it really have anything to do with physics?
gunblaze said:
What really is INERTIA?
A scalar.A vector or a scalar?
No. Not even a force in the social sense.Is it a force.?
cepheid said:Yeah, just to throw in my two cents towards the "phenomenon" camp, I've heard it described this way:
Inertia is a property of matter.
Mass (inertial mass) on the other hand, is a quantity, in fact it quantifies inertia in that it provides a means of physically measuring the effect i.e. we apply a force F to a body, we measure a, we determine what m is, the larger it is, the more difficult a time we had of accelerating the body. What do you guys think of that?
Andrew Mason said:in·er·tia [i núrsh?] noun
1.apathy: inability or unwillingness to move or act
2.resistance to change: the property of a body by which it remains at rest or continues moving in a straight line unless acted upon by a directional force
[Early 18th century. From Latin, “lack of skill, inactivity,” formed from iners (see inert
Encarta® World English Dictionary © & (P) 1999 Microsoft Corporation. All rights reserved.
The inability or unwillingness of a person to move or act is only indirectly related to that person's mass.
For some people, inertia can be overcome with money. For others, one has to use brute force, in which case Newton's second law is a reasonable approximation.
A scalar.
No. Not even a force in the social sense.
AM
From a quick look through their forum it seems what you are looking for is the "http://en.wikipedia.org/wiki/Moment_of_inertia" "maxcode said:[...]
I'm currently working one a game with realistic physics and I'm use the physics library http://www.bulletphysics.com/" . It simulates rigid bodies.
Andrew Mason says Inertia is a scalar but in Bullet it is represented as a vector. [...]
I learned at school (along time ago) that f(force)=m(mass)a(acceleration) but this would be a rule there would be used in Bullet and not a number(vector or scalar).
Any idea on this would be nice. :)
[...]
Newton's first law of Inertia states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.
The greater the mass of an object, the greater its inertia. This means that the object will be more resistant to changes in its state of motion.
Newton's first law applies to everyday life in many ways. For example, when you push a shopping cart, it will continue to move unless an external force (such as friction) acts upon it. Similarly, when you slam on the brakes in a car, your body will continue to move forward due to inertia.
Inertia is the resistance an object has to changes in its state of motion, while momentum is the quantity of motion an object has. Inertia is dependent on mass, while momentum is dependent on both mass and velocity.
Newton's first law can be thought of as a definition of equilibrium. An object in equilibrium has no net force acting on it, which means it will either remain at rest or continue its motion at a constant velocity. This is in line with Newton's first law, as an object will remain in its state of motion unless acted upon by an external force.