Question

informational reading comprehension: physics at play! roller coasters answer the following questions about \physics at play: roller coasters.\ 1. what is the central idea of the text? a. roller coasters do not need engines in order to take the riders through an exciting ride. b. thrill - seeking engineers with specialized physics knowledge design roller coasters. c. roller coasters utilize a combination of physics concepts to take passengers from start to finish. d. roller coasters rely on gravity, potential and kinetic energy, and inertia to keep passengers safe. 2. how does the author develop the central idea over the course of the text? 3. based on information in paragraph 8, what is inertia? a. the tendency of an object to remain still or on a constant course unless a force makes it change b. a law of motion stating that energy can be changed into other forms but never truly lost c. the tendency of an object to be drawn toward the center when moving along a circular path d. a law of motion stating that the higher an object is positioned, the more potential energy it has 4. label the image of a roller coaster with a, b, and c, based on the associated descriptions below. then, cite evidence from the passage to support your answers on the lines below the drawing. a. a mostly even mix of potential and kinetic energy b. a point of mostly kinetic energy c. the point of maximum potential energy evidence: a. b. c. find worksheets, games, lessons & more at education.com/resources

Explanation:

1. The central idea of a text about roller - coasters in a physics context is likely about how they use physics concepts to operate. Option c is the most comprehensive as it mentions the combination of physics concepts to take passengers from start to finish.
2. To answer how the central idea is developed, one would need to analyze the structure and content of the text, such as how different physics concepts are introduced and related to roller - coaster operation.
3. Inertia is defined as the tendency of an object to remain still or on a constant course unless a force makes it change, which is option a.
4. For labeling the roller - coaster image: The point of maximum potential energy (C) is at the highest point of the track. A mostly kinetic energy point (B) is at the lowest point of the track where speed is highest. A mostly even mix of potential and kinetic energy (A) is at an intermediate height on the track. Evidence would come from the text's explanations of potential and kinetic energy in relation to height and speed on a roller - coaster.

Answer:

1. c. Roller coasters utilize a combination of physics concepts to take passengers from start to finish.
2. (No answer provided as text content is needed to analyze development of central idea)
3. a. the tendency of an object to remain still or on a constant course unless a force makes it change
4. C: Highest point of the track; B: Lowest point of the track; A: Intermediate height on the track. Evidence: Potential energy is related to height (higher height = more potential energy) and kinetic energy is related to speed (higher speed = more kinetic energy).