Mechanical energy is a combination of the energy of motion or position. This type of energy describes objects that are moving or could move. A moving ball can have energy from motion. An arrow can also have the energy of motion. Both are types of mechanical energy. Can you think of some other examples? Where does the energy of motion come from? It comes from the energy created by position. This energy is stored energy. This means it is not moving yet, but it has the potential to move. How can you store energy? The arrow gains energy from the drawn bow. As the arrow is released, the bow releases its stored energy and puts the arrow into motion. Can you think of some other ways to store energy using position?
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QUESTION: Why is it possible for a moving ball to still have energy of position?

Take a look at this train in Figure 1.11. It looks very futuristic. What do you notice about it? Did you notice that the train has no wheels? How can a train have no wheels? It doesn't need wheels. It actually floats, or levitates, just above the track. Magnets enable the train to do this. This is not a normal train. This is a maglev train. The word maglev stands for magnetic levitation. Because it has no wheels, there is no friction. Some magnets hold the train up. Other magnets are used to move the train forward. This train can go very fast. It can reach speeds up to 480 kilometers (300 miles) per hour! Magnets are pretty cool. What exactly is a magnet? How is it able to exert such force?
What question would one ask from this paragraph?

QUESTION: What holds the train up and moves it forward?

Zakariya Essabar, a Moroccan citizen, moved to Germany in February 1997 and to Hamburg in 1998, where he studied medical technology. Soon after moving to Hamburg, Essabar met Binalshibh and the others through a Turkish mosque. Essabar turned extremist fairly suddenly, probably in 1999, and reportedly pressured one acquaintance with physical force to become more religious, grow a beard, and compel his wife to convert to Islam. Essabar's parents were said to have made repeated but unsuccessful efforts to sway him from this lifestyle. Shortly before the 9/11 attacks, he would travel to Afghanistan to communicate the date for the attacks to the al Qaeda leadership. Mounir el Motassadeq, another Moroccan, came to Germany in 1993, moving to Hamburg two years later to study electrical engineering at theTechnical University. A witness has recalled Motassadeq saying that he would kill his entire family if his religious beliefs demanded it. One of Motassadeq's roommates recalls him referring to Hitler as a "good man" and organizing film sessions that included speeches by Bin Laden. Motassadeq would help conceal the Hamburg group's trip to Afghanistan in late 1999. Abdelghani Mzoudi, also a Moroccan, arrived in Germany in the summer of 1993, after completing university courses in physics and chemistry. Mzoudi studied in Dortmund, Bochum, and Muenster before moving to Hamburg in 1995. Mzoudi described himself as a weak Muslim when he was home in Morocco, but much more devout when he was back in Hamburg. In April 1996, Mzoudi and Motassadeq witnessed the execution of Atta's will. During the course of 1999, Atta and his group became ever more extreme and secretive, speaking only in Arabic to conceal the content of their conversations. 87 When the four core members of the Hamburg cell left Germany to journey to Afghanistan late that year, it seems unlikely that they already knew about the planes operation; no evidence connects them to al Qaeda before that time. Witnesses have attested, however, that their pronouncements reflected ample predisposition toward taking some action against the United States. In short, they fit the bill for Bin Laden, Atef, and KSM. Going to Afghanistan The available evidence indicates that in 1999, Atta, Binalshibh, Shehhi, and Jarrah decided to fight in Chechnya against the Russians.
What question would one ask from this paragraph?

QUESTION: Which cell members were Moroccan?

Rakal, her first officer, was staring pensively at his panel. He was what this was all about. She watched his graceful fingers ending in thick black claws tap out calculations on the panel. His pointed ears swiveled back and forth, catching every sound from the bridge, while his long tail swished to the rhythm of his thoughts. Only those of the Arrallin Insurrection inner team knew he was no common 'beta furry'. His silken fur, which would be tawny golden and striped with jet black bands, was dyed perfectly to a pure black, and his mane trimmed and thinned as to be indistinguishable from the rest of his coat. His eyes had been treated and darkened to a rich purple to disguise the brilliant golden yellow color that would mark him as an Alpha Arrallin, and leader of his hive. Right now, he looked like an overgrown wolf who'd learned touch-typing. The scout ship re-emerged from the hole - a brilliant speck emerging from a sphere of velvety blackness. It's hail crackled across the comm, and Tara spun to retake her seat at the helm. "Launch the second probe. Won't Central be crushed to learn that another gateway has yielded little more than a class F planet and a white dwarf system. Level 1 and 2 staffers should prepare to be briefed and move out. This sounds like it's the one." The distinctive whuffle of pleasure rippled through the betas on the bridge, and Rakal let loose a small growl, as if to caution his charges against false hope. They'd scouted twenty-seven gates so far, and none had turned up anything worth the Insurrection's time. Tara would not let giddy hopes drag them onto a rock that would spell the end for the project, and the Arrallin species.
What question would one ask from this paragraph?

QUESTION:
What was the second probe being sent out to find?