momentum

The law of conservation of momentum states that momentum can neither be created nor destroyed; the total momentum of any closed system must remain the same. Momentum is mass times velocity. Thus, a ten pound object moving at 5 meters per second has the same momentum as a 2 pound object moving at 25 meters per second (for example). In order to alter the motion of one object, you have to transfer the momentum to another object. Now, this principle is not intuitively obvious, because we are constantly changing the motion of objects without seeing such a transfer of momentum. For example, if we start walking, our own momentum increases, where does it come from? In that case, it comes from the planet Earth. Since the Earth is so large, when we transfer momentum to or from the Earth, we never see a change in the way the Earth is moving. The change does happen, but it is not observable. It is the product of mass and velocity.gjkshhrueiuh merntjhergmwrfkdb if iaf iufhi ihiuyfhg dgf djfhgliuer guirgjsgfg usgfuyag ftayft tfig uaidfigfg hb hgsdfjdgviig dif hd f dggadfg;djhglhdv kjf. fg sdf g fgkjgsdfiueruitkjsdhfsdiffgerukv iu riuei iu yg geri eiueiu iu riu rg dfg iudygiud gkjdkufgu idgiudgiudgiud gd giudgyd ukfg dkufyg g iduf giudy gidu gidgudfg kgf idufy gidgy idugy iduyg idouhgshdf vkidcvxidf gxkdfiuyg hg xdfgbiurgs dfl ilf glifhg iufhgkjfglfglihdf hfg fghlkf hlf gsdugjh gsdhfgisdgyksgiuhdfghs dfogodhfgsidrk flskhdf gsf89 hfjksdbg k hfiuhdfbhnderkj fufbfenbfueb jnmfhg jfbifnjfh fhnvbiuhsdfnc fdjsdhf sdfbh kjfnjlkdsfow hfjhflkhfae ldfbsldkjgh kdnlkjsdlfu ie lhf gl oitg elfj kjhks gkgjkhfgjkhgkjd gkgkdjfg dfhg .d fgh df.g gdjfggh gkshf kjhgeoriugh dkfvndfsg kdjfghiuret;swhdsfh ghgkh kh kh sjghskhk h skdhfkshdf sjhdf kshdf khdfksjdfnlkdhfglsdbf