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force
In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity. It is measured in the SI unit of newtons and represented by the symbol F.
The original form of Newton's second law states that the net force acting upon an object is equal to the rate at which its momentum changes with time. If the mass of the object is constant, this law implies that the acceleration of an object is directly proportional to the net force acting on the object, is in the direction of the net force, and is inversely proportional to the mass of the object.
Concepts related to force include: thrust, which increases the velocity of an object; drag, which decreases the velocity of an object; and torque, which produces changes in rotational speed of an object. In an extended body, each part usually applies forces on the adjacent parts; the distribution of such forces through the body is the internal mechanical stress. Such internal mechanical stresses cause no acceleration of that body as the forces balance one another. Pressure, the distribution of many small forces applied over an area of a body, is a simple type of stress that if unbalanced can cause the body to accelerate. Stress usually causes deformation of solid materials, or flow in fluids.
Misc. items I didn’t return in time.
(All are new & unused)
blue force gear - triple magazine pouch $40
Blue force gear single - single magazine pouch $20
Revolver/pistol pouch $10
Xdm Springfield XD / XD MOD2 16 round magazines $20 each
Will trade for 5.56 - .223
And maybe some sharp-eyed veterans of the other services.
The spread of military insignia depicted below is from a recently deceased veteran.
The quiz is this. What is odd about the items shown in this picture? Not counting the missing ribbon on the second row ribbon bar.
I will...
Just cleaning out some stuff I don't need, hoping to turn it into things I can use, trades will be listed at the bottom of the ad.
I work in NW Portland and you are welcome to come to my work for pick up, I will ship if you spend at least $40 and you cover shipping. Feel free to make offers on...