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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.
SUCKS Bigly! Why do these people do this? I haven't played with it much yet but it looks like you can only look at one bullet/powder at a time? And have to start from the beginning? Instead of being able to ad another bullet/powder to your existing page?
Up for sale is a discontinued, rare, great condition S&W 327 Performance Center 8 shot .357 mag.
Comes with S&W replacement box, 3 moon clips, and S&W logo brown paper wrap.
I have something I'm after, and if something else sells, this ad will quickly be taken down.
$ale Pending
A video...
2 sizes of Neck Brushes
Small and Large Primer Pocket Brushes.
Chamfer and deburr.
Runs great.
Have Small and Large Primer Pocket Uniformer attachments available at additional charge if desired.
Will ship at cost.
$60
Cash, check or money order.
misterarman AKA John 360.771.0013
LAST CHANCE IF IT DOES NOT SELL AT THIS PRICE, I AM KEEPING IT, NO REASON TO GIVE IT AWAY :) I am moving out of the state. If it is not sold by 3/31, it goes with me to South Carolina :D
Yet another from my collection up for grabs. In excellent condition. I bought it used on Gunbroker and have...
S&W Shield Performance Center 2.0 9mm, 3.1" barrel, performance center tunes, hi-vis front and rear sights, ported barrel/slide, manual safety, talon grip tape, 1 seven and 1 eight-round magazines. I purchased it brand new in 2015. Approximately 500 rounds were fired through it without failing...
Trade for
AR pistol or AR build in 223 or 556 plus cash from me to you
I have vortex viper 6 MOA optic to add towards the trade
Canik tp9 elite SC
Kel Tex pmr30
I recently moved up to the shield plus and this excellent condition m&p shield performance center 9mm is up for sale or trade...
This is an as new S&W Model 41 performance center 22lr with 5.5" barrel. I am the original purchaser and have never shot it. There is very light finish wear on the left front of the barrel on the hard edges and front sight. These were there when I purchased and can be seen in the photo. The only...
Lyman Case Prep Xpress Case Prep Center In good condition, with chamfer and debit bits, small and large primer pocket cleaner’s, ànd various sizes of bore brushes
Looking for a Contender / G2 compatible barrel.
Need blued 16 - 23" barrel in 45LC doesn't need to be 45/410 but if it is ok but would need the choke and maybe the wrench (see them online 3D printed for about $15)
Using it as an open site barrel so sites are great if not have an Encore katahdin...
Selling a S&W model 60 performance center 357 Mag fired just a few rounds Brushed chrome with wood grips and performance center upgrades original box
transfer on your dime Beaverton/Hillsboro area
Great pistol, shoots amazing and feels great in the hand.
Comes with 2 sets of grips it is in great shape and has a very low round count.
Trade interest are 44 mag revolvers, or other similar pistols