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# Gravity Resources

by Ron Kurtus (revised 18 February 2016)

The following material consists of website and book resources on gravity.

## Contents

- Basics of gravity
- Vectors
- Gravity constant
- Weak Equivalence Principle
- Falling bodies
- Work and gravity
- Artificial gravity
- Newton's Cannon
- Artillery projectile

Use these resources to help your understanding of the material.

## Basics of gravity

Force of Gravity- Universe Today Magazine

Earth's gravity- Wikipedia

How does gravity work?- How Stuff Works

Standard gravity- Average value, as compared to variation due to position on Earth - Wikipedia

International Gravity Formula- Variation of gravity with distance from equator - Geophysics dept. University of Oklahoma

I feel 'lighter' when up a mountain but am I?- National Physics Laboratory FAQ

## Vectors

Vectors - Fundamentals and Operations- Physics Classroom

Basic Vector Operations- HyperPhysics

Vectors and Direction- Physics Classroom

Independence of Perpendicular Components of Motion- PhysicsClassroom.com

## Gravity constant

Acceleration Due to Gravity- TutorVista.com

The Value of g- Physics Classroom

Acceleration Due to Gravity- Haverford College

The Acceleration of Gravity- Physics Classroom

Difference Between Pound-Force and Pound-Mass- Engineerography Blog

## Weak Equivalence Principle

Test of Weak Equivalence Principle- Precision Astronomy Group of Harvard-Smithsonian Center for Astrophysics

Feather & Hammer Drop on Moon- YouTube video

## Falling bodies

Falling Bodies- Physics Hypertextbook

Equations for a falling body- Wikipedia

Gravity Calculations - Earth- Calculator

Kinematic Equations and Free Fall- Physics Classroom

## Work and gravity

Work by gravityby Sunil Kumar Singh - Connexions

Gravity and Inertia in Running- Locomotion and Biology paper (PDF)

## Artificial gravity

Artificial gravity- Wikipedia

Simulating Gravity in Space- From Batesville, Indiana HS Physics class

Artificial Gravity and the Architecture of Orbital Habitats- Theodore W. Hall - Space Future; detailed technical paper

Artificial Gravity- Technical resources from Theodore W. Hall -

The Physics of Artificial Gravity- Popular Science magazine

Simulated Gravity with Centripetal Force- Oswego City School District Exam Prep Center, New York

## Newton's Cannon

Newton's Cannonball and the Speed of Orbiting Objects- Bucknell University Physics

Newton's cannonball- Wikipedia

## Artillery projectile

Trajectories- Hyperphysics

Projectile Motion- Wikipedia

Projectile Motion Equations And Formulas Calculator- AJ Design Software

Trajectory of a projectile- Wikipedia

Characteristics of a Projectile's Trajectory- Physics Classroom

## Books

Reinventing Gravity: A Physicist Goes Beyond Einsteinby John W. Moffat; Smithsonian (2008) $27.95

Head First Physics: A learner's companion to mechanics and practical physics by Heather Lang; O'Reilly Media (2008) $29.99

Gravity: An Introduction to Einstein's General Relativityby J. B. Hartle; Benjamin Cummings (2003) $84.00

### Physical Science textbooks

Conceptual Physical Science- Chapter 4 Gravity and Satellite Motion by Paul G. Hewitt, John Suchocki and Leslie A. Hewitt, Addison-Wesley Longman (2004); $87

Physical Science: A Unified Approach- Chapter 5 Motion and Gravity by Jerry Schad, San Diego Mesa College, Brooks/Cole Publishing Co. (1995); $215

### Physics textbooks

Physics: Algebra/Trig- Chapter 5 Centripetal Force and Gravity by Eugene Hecht, Adelphi University; Brooks/Cole Publishing (2002) $239

Physics: Principles with Applications- Chapter 5 Circular Motion and Gravitation by Douglas C. Giancoli, Prentice Hall (2004) $199

## Summary

If you have other good resources on these topics, let us know.

Enthusiasm is infectious

## Questions and comments

Do you have any questions, comments, or opinions on this subject? If so, send an email with your feedback. I will try to get back to you as soon as possible.

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gravity_resources.htm**

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## Gravity Resources