Answer:
As mentioned in the previous part of this lesson, momentum is a commonly used term in sports. When a sports announcer says that a team has the momentum they mean that the team is really on the move and is going to be hard to stop. The term momentum is a physics concept. Any object with momentum is going to be hard to stop. To stop such an object, it is necessary to apply a force against its motion for a given period of time. The more momentum that an object has, the harder that it is to stop. Thus, it would require a greater amount of force or a longer amount of time or both to bring such an object to a halt. As the force acts upon the object for a given amount of time, the object's velocity is changed; and hence, the object's momentum is changed.
The concepts in the above paragraph should not seem like abstract information to you. You have observed this a number of times if you have watched the sport of football. In football, the defensive players apply a force for a given amount of time to stop the momentum of the offensive player who has the ball. You have also experienced this a multitude of times while driving. As you bring your car to a halt when approaching a stop sign or stoplight, the brakes serve to apply a force to the car for a given amount of time to change the car's momentum. An object with momentum can be stopped if a force is applied against it for a given amount of time.
A force acting for a given amount of time will change an object's momentum. Put another way, an unbalanced force always accelerates an object - either speeding it up or slowing it down. If the force acts opposite the object's motion, it slows the object down. If a force acts in the same direction as the object's motion, then the force speeds the object up. Either way, a force will change the velocity of an object. And if the velocity of the object is changed, then the momentum of the object is changed.
Explanation:
Answer:
Frédéric Sorrieu was a French engraver, printmaker, and draughtsman. He was notable for his works testifying the liberal and nationalist revolutions in France and in Europe.
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Country Cause for Change Description of Change Made Effect of Change The Country Today
Chile The United States opposed Allende’s socialist policies and supported a military coup. The US-backed coup removed Allende from power and installed Pinochet as ruler. Pinochet was cruel and oppressive. He jailed and tortured many people. Chile transitioned to democracy in the late 1980s.
Nicaragua The corrupt Somoza family ruled for four decades. The pro-communist Sandinistas overthrew the government. The US-backed Contras fought Sandinistas. A civil war followed. Nicaragua transitioned to democracy in the 1990s.
Argentina The country had been an oligarchy since gaining its independence from Spain. The Great Depression was a blow to Argentina’s economy. Juan Perón led a populist movement. The government fell to military juntas in the 1970s. The juntas undertook a “Dirty War” against citizens. The juntas disbanded in 1983 Democracy was restored in Argentina in the early 1980s and the country’s economy recovered.
Mexico For 50 years, one political party (PRI) controlled Mexican politics. Vicente Fox challenged the PRI in the 2000 election. A government was stable, and the unemployment rate fell. Mexico still faces challenges with poverty and drug cartels.
Brazil The country came under military rule in the 1960s and experienced a booming economy. An election in 1985 restored democracy. The democratic government worked to reduce economic inequality. Brazil is a democracy with steady economic growth.
Explanation:
<em>Mercantilism</em> is defined as the economic system in which the mother country controls trade with her colonies in order to increase her own prosperity, this because mercantilist countries tend to export more goods than the ones imported by them. Such economic system was practiced by England during the American colonial period.
In the particular case of South Carolina, <em>mercantilism</em> served not only as a market for British manufactured goods but also as a source of raw materials for such nation. Specifically, rice and cobalt were listed as products which could only be sold to England. This situation benefited American colonists since in this way a market for such products was secured, helping South Carolina to prosper economically thanks to this payment of additional money.
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