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.

Question: "What forces acts on a book on a table?"

Response: "The table pulls the book upwards and the earth pulls it down"
OPTIONS:
- no
- yes

A: yes

A handful of Bronze Age relics has fostered an assumption that prehistoric settlers inhabited Ibiza thousands of years ago. Greater evidence of such a people is found on Mallorca and Menorca than on Ibiza, but one of the Balearics' most important sites is actually on the island of Formentera, where the megalithic monument/tomb of Ca Na Costa has been dated to 2000 b.c. Ibiza's key location between Africa and ancient Iberia made it a convenient stopover for Mediterranean seafarers, such as the Phoenician traders, who called the island Ibosim. The Greeks dubbed it Ebysos, the Romans called it Ebusus, and the Moors, Yebisah. The Carthaginians: A detailed history of the island doesn't begin until it became a colony of Carthage in the 7th century b.c. . The Carthaginians originally came from the area comprising present-day Lebanon, and from their bases in North Africa and what's now Spain, they challenged the Roman Empire for domination of the Mediterranean region. Their interest in Ibiza lay partly in its vast salt flats, which to this day remain the source of a profitable industry. They capitalized on the natural resources by using the salt to cure fish, which they exported to their home country. The Carthaginians also carried out lead mining and continued to be of significance up until this century. It is believed that the lead pellets which were used by the Carthaginian general Hannibal were made on Ibiza. The Carthaginians also considered the island a holy place, and here in great splendour they buried thousands of their citizens in a huge necropolis on the Puig des Molins (Hill of the Windmills) below the Dalt Vila (Old Town) of Ibiza. Under the gnarled olive trees archaeologists have uncovered a treasure trove of statues, jewellery, pitchers, tools, and coins, which are now displayed in the town's two archaeological museums. The Romans never really infiltrated Ibiza, and even after the defeat of Hannibal in 202 b.c. during the Second Punic War their influence was restrained. Only with the fall of Carthage in 146 b.c. did they manage to make inroads, but, as local historians stress, Ibiza was neither conquered nor annexed by Rome, but confederated, retaining remarkable autonomy. For centuries to come the old Carthaginian traditions were allowed to continue on Ibiza alongside the new Roman way of life.

Question: "What was the Greek name for Ibiza?"

Response: "Phoenician"
OPTIONS:
- no
- yes

A: no

Even after Bin Laden's departure from the area, CIA officers hoped he might return, seeing the camp as a magnet that could draw him for as long as it was still set up. The military maintained readiness for another strike opportunity. On March 7, 1999, Clarke called a UAE official to express his concerns about possible associations between Emirati officials and Bin Laden. Clarke later wrote in a memorandum of this conversation that the call had been approved at an interagency meeting and cleared with the CIA. When the former Bin Laden unit chief found out about Clarke's call, he questioned CIA officials, who denied having given such a clearance. Imagery confirmed that less than a week after Clarke's phone call the camp was hurriedly dismantled, and the site was deserted. CIA officers, including Deputy Director for Operations Pavitt, were irate." Mike" thought the dismantling of the camp erased a possible site for targeting Bin Laden. The United Arab Emirates was becoming both a valued counterterrorism ally of the United States and a persistent counterterrorism problem. From 1999 through early 2001, the United States, and President Clinton personally, pressed the UAE, one of the Taliban's only travel and financial outlets to the outside world, to break off its ties and enforce sanctions, especially those relating to flights to and from Afghanistan. These efforts achieved little before 9/11. In July 1999, UAE Minister of State for Foreign Affairs Hamdan bin Zayid threatened to break relations with the Taliban over Bin Laden. The Taliban did not take him seriously, however. Bin Zayid later told an American diplomat that the UAE valued its relations with the Taliban because the Afghan radicals offered a counterbalance to "Iranian dangers" in the region, but he also noted that the UAE did not want to upset the United States.

Question: "How did the United States' relationship with UAE change after 9/11?"

Response: "All diplomatic relationships were broken"
OPTIONS:
- no
- yes

A:
no