Momentum is not conserved if there is friction, gravity, or net force (net force just means the total amount of force). What it means is that if you act on an object, its momentum will change. This should be obvious, since you are adding to or taking away from the object's velocity and therefore changing its momentum.
Somerville, Massachusetts. Somerville (/ËsÊmÉrvÉªl/ SUM-Ér-vil) is a city located directly to the northwest of Boston, in Middlesex County, Massachusetts, United States. As of 2010, the United States Census has the city with a total population of 75,754 people, and is the most densely populated municipality in New England.
For the cardiovascular study, see Framingham Heart Study. For the English town, see Framlingham. Framingham (IPA: /ËfreÉªmÉªÅËhÃ¦m/) is a town in Middlesex County, Massachusetts, United States. The population was 68,318 as of the United States 2010 Census, making it the 14th most populous municipality in Massachusetts.