Question

read the introduction to a magazine article. your hands are up, your eyes are squeezed tight, your mouth is poised to unleash a scream - you are on a roller coaster. but are you recalling science - class lessons about gravity and inertia? are you contemplating the gears and mechanisms providing this thrill? it is unlikely that academics are on your mind, but lessons are lurking behind every ride. what will most likely be included in the magazine article that follows this introduction? a description of the history of roller coasters criticisms about roller - coaster safety testimony from roller - coaster enthusiasts an explanation of the physics of roller coasters

Explanation:

The introduction focuses on the experience of being on a roller - coaster and then hints at the science (physics concepts like gravity and inertia) behind it. A description of the history of roller - coasters is not related to the science - hinting introduction. Criticisms about safety are also not in line with the science - related hint. Testimony from enthusiasts is more about personal experience rather than the science. Since the introduction mentions science - class lessons (which are likely physics lessons) about concepts relevant to roller - coasters, an explanation of the physics of roller - coasters is the most likely next content.

Answer:

an explanation of the physics of roller coasters