Mission CG9: Weightlessness

Mission CG9 focuses on the distinction between the weight of a person and the perceived sense of the weight. The mission consists of 31 questions organized into 9 Question Groups. You must answer one question from each Question Group to complete the mission. The learning outcomes for this mission are ...

Learning Outcomes

  • The student should be able to distinguish between the weight of an object and the sensations of weightlessness experienced by an object and to explain the cause of these sensations.
  •  The student should be able to apply concepts of weight and weightlessness to explain a variety of motions such as roller coaster motions and satellite motion.


Launch Mission CG9


Getting Help

If you are not familiar with this topic, then you should first learn about the topic using our written Tutorial or our Video Tutorial:

The Physics Classroom - Circular Motion Unit, Lesson 4, Part d


Video Tutorials:

Weightlessness in Orbit



Question-Specific Help

Each Question Group has its own Help page with information specific to the question. You can access the Help page from within the mission by tapping on the Help Me! icon (textbook). For your convenience, links to those pages are provided below: