What if two children push a swing at the same time? Would the swing go higher? Yes, together their force would be more. It is common for forces to be combined. Most objects on Earth have at least two forces acting on them. Do you know what one of them is? Of course, that force is gravity. How many forces do you have on you right now? Gravity pulls you down toward the center of Earth. Your legs exert a downward force. They hold you up against the pull of gravity. Consider the example in Figure 1.3. A book is resting on a table. Gravity pulls the book downward. It has a force of 20 newtons. At the same time, the table pushes the book upward. Its force is also 20 newtons. The table opposes the pull of gravity.
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QUESTION: What forces acts on a book on a table?

Dam Good Luck: From the beginning, Las Vegas was built to serve travelers. The railroad needed a way station, and Las Vegas was the place. Growth continued for ten years, and by 1915 the town had telephones, round-the-clock electricity, and a growing populationmany of whom worked in the railroad repair shop. But such heady progress would soon come to a halt. The growing competition in rail transport resulted in Union Pacific buying the Los AngelesSalt Lake line. Union Pacific then consolidated its operations, eliminating the Las Vegas repair facility. Additionally, Las Vegas had been made a part of Nevada's new Clark County in 1909, a year when the legislature also outlawed gambling. These unfortunate circumstances threatened to relegate Las Vegas to the status of a small desert community that could no longer support its 3000 residents. But the southwest's growing need for water, combined with Las Vegas's fortuitous proximity to the Colorado River, would give Las Vegas a second chance to achieve prosperity. Construction on Hoover Dam (originally Boulder Dam, subsequently renamed for the president who authorized the project) began in 1931 in a canyon 45 miles (72 km) southeast of Las Vegas. Providing an influx of $165 million to the southwestern economy, Hoover Dam played a major role in preventing Las Vegas from drying up, both financially and literally. Not only did it create jobs, but it also created Lake Mead, the massive reservoir that today provides water to all of southern Nevada. More Government Help: The construction of Hoover Dam did not single-handedly save Las Vegas, however. The state legislature helped as well, by legalizing gambling in 1931 and thus solidifying the future of the town, though legislators and residents could never have known this at the time. The hordes of people who attended Hoover Dam's 1935 dedication set the city's now-formidable public relations machine into action. They went to work on what has become one of the lengthiest citywide tourism campaigns ever attempted. It didn't take long for the city to establish itself as a wild-West town with an "anything goes" attitude. Vices outlawed or heavily controlled elsewhere were legal here, available any hour of any day (or night).
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QUESTION: What was the answer to the southwest's need for water?

How would the universe look without gravity? It would have no planets and no stars. Thats how it looked when it was young. When the universe was young, there was only gas and dust. From this gas and dust, everything we now see was made. How were stars and planets created from just gas and dust? The answer is gravity. The same gravity that holds you down on Earth. The same force that causes your pencil to roll off your desk. The same force that causes it to fall to the floor. The invisible force of gravity caused dust and gas particles to be pulled together. This force is what formed all the objects in our solar system. This force formed the smallest moons. It also formed our Sun. This force caused more than just our solar system to form. It caused all the other solar systems to form. It caused the formation of all the galaxies of the universe.
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QUESTION: Did gravity cause more than one solar system to form?

On a day it celebrated 50 years of giving free legal advice, Southern Arizona Legal Aid announced it has received two grants totaling more than $7 million. One of the grants includes the creation of a Web site with legal advice for the poor. A three-year grant worth $6.6 million and a separate technology grant were announced at a press conference and dinner held Thursday at Evo. A. DeConcini Federal Courthouse, 405 W. Congress St. Deconcini was one of the organization's early board members. Thursday's celebration was the first public even held at the courthouse. About 100 members of the legal community attended, including state Attorney General Janet Napolitano and Arizona Supreme Court Justice Thomas Zlaket. Both grants come from the Legal Services., a private, nonprofit corporation established by Congress in 1974 to offer poor people equal access to the justice system. It's funded through congressional appropriation. The $6.6 million grant will pay for staffing operations. The Web site, which will be created with a $50,000 grant, is intended to offer legal advice to poor people across Arizona, said Paul Julian, chief executive officer of Southern Arizona Legal Aid. He said he wants every poor person in Arizona to have legal help. "This is another step in trying to realize that. We feel like we do a pretty good job of helping people who find us," Julian said. Julian said that though most people do not own computers, they can still access them at libraries, schools, and courthouses. He said the Web site will help bridge the "digital divide" that keeps the poor from using the Internet as a resource. Southern Arizona Legal Aid was founded in 1951 as the Legal Aid Society of the Pima County Bar Association. It offered free legal advice on civil matters including disputes in small claims court, divorce proceedings and obtaining Social Security benefits. Charles Ares, a member of the board of directors in the 1950s, said the office was kind of a charity operation.
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QUESTION:
What grants did Southern Arizona Legal Aid receive on the day it celebrated 50 years of giving free legal advice?