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center
In physics, the center of mass of a distribution of mass in space (sometimes referred to as the balance point) is the unique point where the weighted relative position of the distributed mass sums to zero. This is the point to which a force may be applied to cause a linear acceleration without an angular acceleration. Calculations in mechanics are often simplified when formulated with respect to the center of mass. It is a hypothetical point where the entire mass of an object may be assumed to be concentrated to visualise its motion. In other words, the center of mass is the particle equivalent of a given object for application of Newton's laws of motion.
In the case of a single rigid body, the center of mass is fixed in relation to the body, and if the body has uniform density, it will be located at the centroid. The center of mass may be located outside the physical body, as is sometimes the case for hollow or open-shaped objects, such as a horseshoe. In the case of a distribution of separate bodies, such as the planets of the Solar System, the center of mass may not correspond to the position of any individual member of the system.
The center of mass is a useful reference point for calculations in mechanics that involve masses distributed in space, such as the linear and angular momentum of planetary bodies and rigid body dynamics. In orbital mechanics, the equations of motion of planets are formulated as point masses located at the centers of mass. The center of mass frame is an inertial frame in which the center of mass of a system is at rest with respect to the origin of the coordinate system.
SW MP 40 Shield M2.0 with Green Laser, 3.1" barrel, no safety. Great EDC, cleaned regularly and in near perfect shape. About 600 down the pipe. Trijicon night sights, orange front.
Also comes with a Crimson Carbon fiber graphic VEDDER kydex IWB holster. Comes with 1ea 6rnd, 1ea 7rnd mag...
Like New (fired 32 rounds) S&W M&P 9 Shield M2.0 PC (Performance Center) 4".
Fiber optic sights.
Comes with 4 - 8 round OEM S&W mags and three holsters,
Uncle Mike's (OWB),
BLACKHAWK Leather Tuckable Pancake Holster (New) and
Generic IWB/OWB Made in U.S.A Holster (New).
$425 Firm (Buyer covers...
I have a S&W 629-6 Performance Center .44 magnum up for sale. It has been recently KG Guncoated by south ridge arms in Milton Washington and has a D&L sports combat rear sight installed. It will also come with 40 rounds of Hornady 240 grain ammo, two speed loader pouches, one speed loader, and...
This rifle would be a good starter rifle for a kid. Big muzzle brake almost completely eliminates recoil. Some pretty neat features in this very inexpensive rifle. Scope in picture is not included, just the rifle and muzzle brake. Call or text preferred 503-383-4751
I have for sale 2 Smith and Wesson 9mm MP 2.0 Shield EZ's. Both new in box and include Davidson's lifetime guarantee for the original purchaser. FFL. No transfer fee if transaction is at my location in the Kennewick area, or I can ship either of these firearms to your FFL/Dealer via USPS...
Real big city shoot em up there kids . Big shout out, and congratulations to the city of Seattle. Just wanted to convey my admiration for your nailing down the basics of being a leftist mecca. Rampant open use of hard drugs, overdoses, massive swathes of homeless, sidewalk feces. Now a motion...
This is a T/C TCR model 87 (I think, could be an 83, I dont really know how to tell for sure)....Its in perfect shape with only some slight handling marks, gun was shot very little if at all...It is in the harder to find 308 chambering and has the single hunter style trigger...Iron sights with a...
Why am I selling a gun I just bought??
At the time of this post (5/15) I bought my S&W Performance Center Shield Plus 4', yesterday (5/14). I carry a Sig p365XL, but was so impressed by the S&W at my store I decided I should give it a try and see if it will steal me away from Sig. While I like...
I've had this for three or four years. It's a straight up PC Shield, not a 2.0 or plus. Ported, fiber optic sights, etc...
It comes with the box, manual and box candy.
It came with one seven and one eight round mag. I'll include two new extra eight round mags for a total of four mags.
$450...
Do you want to own an adult gun, in an adult caliber? Tired of those plastic things posing as a firearms? Want to make your wheel gun friends jealous? Care to fire your weapon and not leave any casing evidence for after? If you answered "yes" to any of the above, you're in luck!
Up for sell my...
Do you want to own an adult gun, in an adult caliber? Tired of those plastic things posing as a firearms? Want to make your wheel gun friends jealous? Care to fire your weapon and not leave any casing evidence for after? If you answered "yes" to any of the above, you're in luck!
Up for sell my...
Fired on two occasions, slight holster wear on heal. Will come with a Bladetech Klipt holster, Hogue grips and original S&W wood grips. Pics up soon, NO Trades, transfer a must. I’m in Snohomish, will transfer as far south as Pantel in Renton. Thanks
PULLED.
I has an AS NEW T/C Compass in .308 Win. I have it's box w/ all the inserts.
It is in a Boyd's Laminated "Green" Wood Stock.
Added an EGW 7 1/2" Pic Rail [$30.00]
These are a Lot of Rifle for the Money.
These are 1:12", 5 LAND RH twist w Threaded Muzzle: 5/8" x 24.
ADJUSTABLE TRIGGER...
My daughter is gifting us a 60" JUMBOTRON TV. Our current entertainment center (see pic) is rather tall and houses our existing 42" TV nicely and the JUMBOTRON TV will have to be either wall mounted or set on top so looking for options. If I could find one that is about 3' - 42" tall max with a...
Thompson Center Arms Barrels / Action
22 Hornet Encore 15" barrel with scope mounts with Bushnell red dot scope. No sites $150
Will trade for 22 MAG or 17 HMR Gun or AMMO
Hello, I have my 9mm M&P Shield with ported barrel and ported slide and night sights. Have only shot 3 or 4 mags through it and then it has just sat in a holster in my truck for over a year. lol I have other guns I carry so I never I use this one. Comes with original box and the two magazines...