<meta http-equiv="refresh" content="1; url=/nojavascript/"> Centripetal Forces | CK-12 Foundation
Dismiss
Skip Navigation
You are reading an older version of this FlexBook® textbook: People's Physics Book Version 3 (with Videos) Go to the latest version.

Chapter 6: Centripetal Forces

Difficulty Level: At Grade Created by: CK-12

The Big Idea

In the absence of a net force, objects move in a straight line. If they turn — that is, if their velocity changes, even only in direction — there must be an applied force. Forces which cause objects to turn around continuously in a circle are known as centripetal forces. When an object moves in a circle its velocity at any particular instant points in a direction tangent to the circle. The acceleration points towards the center of the circle, and so does the force acting on it. This is only natural, when you think about it — if you feel a force pushing you towards your left as you walk forward, you will walk in a circle, always turning left.

The reason the Earth orbits the sun is due to the Universal Law of Gravity and centripetal motion. The Universal Law of Gravity was a great achievement in the history of mankind. It unified the 'heavenly bodies' and the 'Earthly bodies'. Isaac Newton showed that an apple falling to the ground and the moon orbiting Earth are both explained by the same laws of physics.

Chapter Outline

Chapter Summary

Image Attributions

Description

Subjects:

Grades:

Date Created:

Feb 23, 2012

Last Modified:

Sep 15, 2014
Files can only be attached to the latest version of None
Please wait...
Please wait...
Image Detail
Sizes: Medium | Original
 
CK.SCI.ENG.SE.1.Physics-People's-Physics-(Video).6

Original text