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# Artificial gravity in a space station

### What if we did the opposite? Run in circular bowl (as below.) Your body wants to continue moving in a straight line but the bowl (the shaped ground) has an inward-pointing FN  (normal force.) This prevents you from flying out so you’re stuck moving along the surface.

From Conceptual Physics, Hewitt:

Hewitt

## O’Neil colonies

### Each would be 5 miles (8.0 km) in diameter and 20 miles (32 km) long, connected at each end by a rod via a bearing system. They would rotate so as to provide artificial gravity via centrifugal force on their inner surfaces. {Wikipedia}

A pair of O’Neill cylinders. NASA ID number AC75-1085

Rick Guidice, NASA Ames Research Center; color-corrector unknown

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## Videos

Visions Of The High Frontier Space Colonies of 1970

## Learning Standards

SAT Subject Test in Physics
Circular motion, such as uniform circular motion and centripetal force

2016 Massachusetts Science and Technology/Engineering Curriculum Framework
HS-PS2-1. Analyze data to support the claim that Newton’s second law of motion is a
mathematical model describing change in motion (the acceleration) of objects when
acted on by a net force.

HS-PS2-10(MA). Use free-body force diagrams, algebraic expressions, and Newton’s laws of motion to predict changes to velocity and acceleration for an object moving in one dimension in various situations

Massachusetts Science and Technology/Engineering Curriculum Framework (2006)
1. Motion and Forces. Central Concept: Newton’s laws of motion and gravitation describe and predict the motion of most objects.
1.8 Describe conceptually the forces involved in circular motion.