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 part of one's body can hold them up against the force of gravity?"

OPTIONS:
- no
- yes

Answer: "Core"

Response: no

Cathy Wallace did not always know what she wanted to be when she grew up. She wanted to help people, but did not know exactly how. A suggestion from friends sparked her interest. "When I was in college, I thought I wanted to be a doctor," she said. "I found I didn't want to do that and realized an interest in psychology. I didn't know what I wanted to do, but all my friends thought I should go into law because I was always on a soapbox. I decided to try it." Recently, Wallace received the Outstanding Woman Lawyer in Public Interest Law Award. The award was voted on and presented by the women's caucus of West Virginia University College of Law. Wallace, 38, called Gastonia home from the age of 8 until she graduated from Hunter Huss High School in 1983. Her parents, Carter Bond, 66, and Carol Bond, 59, are still residents of Gastonia. From Hunter Huss, she moved on to pursue a degree at Pfeiffer University in Misenheimer. After graduation from Pfeiffer in 1987 with a bachelor's degree in both biology and psychology, she worked as legal secretary for attorney Louis A. Bledsoe Jr. for a year and a half. "Working for Louis Bledsoe was a pivotal moment," she said. "That was when I decided to go into the practice of law." She received her law degree at the University of Arkansas in 1992 and began her legal career in Public Defender Corp. in Princeton. She also taught criminal justice classes at Bluefield College in West Virginia. Wallace lives in Athens, W. Va., with her husband Rob, 37, and her daughters Rachel, 11, and Claire, 5.

Question: "When she first decided she wanted to help people, what did Ms. Wallace think she wanted to do?"

Response: "Wanted to be a nurse"
OPTIONS:
- no
- yes

A: no

Problem: At 8:38, Ong told Gonzalez that the plane was flying erratically again. Around this time Sweeney told Woodward that the hijackers were Middle Easterners, naming three of their seat numbers. One spoke very little English and one spoke excellent English. The hijackers had gained entry to the cockpit, and she did not know how. The aircraft was in a rapid descent. At 8:41, Sweeney told Woodward that passengers in coach were under the impression that there was a routine medical emergency in first class. Other flight attendants were busy at duties such as getting medical supplies while Ong and Sweeney were reporting the events. At 8:41, in American's operations center, a colleague told Marquis that the air traffic controllers declared Flight 11 a hijacking and "think he's [American 11] headed toward Kennedy [airport in New York City]. They're moving everybody out of the way. They seem to have him on a primary radar. They seem to think that he is descending." At 8:44, Gonzalez reported losing phone contact with Ong. About this same time Sweeney reported to Woodward, "Something is wrong. We are in a rapid descent . we are all over the place." Woodward asked Sweeney to look out the window to see if she could determine where they were.

Question: "What did Sweeney tell Woodward s/he was alarmed about around 8:44?"

Answer: "The hijackers gained entry to the cockpit"

OPTIONS:
- no
- yes
Answer: no

Before the mysterious disappearance of one of its passenger jets this month, Malaysia wasn't a country used to finding itself dominating headlines around the world. Some of its Southeast Asian neighbors, including Indonesia and the Philippines, have suffered devastating natural disasters in recent years and are all too familiar with the media frenzy that accompanies a major crisis. But Malaysia has largely managed to stay out of the international spotlight since its independence from British colonial rule more than half a century ago. "It is one of these countries, because of its geography, that doesn't have earthquakes," said Ernest Bower, senior adviser for Southeast Asia studies at the Center for Strategic and International Studies. "It doesn't have tsunamis. It hasn't been tested with a disaster like this." The disappearance of Malaysia Airlines Flight 370 has thrust the government into the dazzling glare of worldwide attention. And it hasn't emerged with very good grades. "I think on a stress test, they're failing," Bower told CNN's Jake Tapper, pointing to the government's coordination of different agencies and communication with other countries. China among critics Criticism and complaints have come from other countries involved in the search for the missing plane, including China and Vietnam, and from the relatives of passengers. Malaysian officials have created confusion by issuing contradictory statements on key aspects of the investigation. The majority of the people on board the plane were Chinese, and Beijing has increasingly voiced its displeasure with the search, especially after Malaysia announced over the weekend that evidence suggested the plane had been deliberately flown west into the Indian Ocean, away from its last confirmed location over the South China Sea. "The new information means the intensive search in the South China Sea for the whole past week was worthless and would never bear fruit," said a commentary published by China's state-run news agency Xinhua. "Even worse, the golden time for saving possible survivors, if any, was generously wasted."

Question: "Who was critical of Malaysia's response?"

OPTIONS:
- no
- yes

Answer: "Ernest Bower, China, Vietnam"

Response:
yes