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## Astro Week 3 Monday Notes

by: Anjali Grutzius

21

0

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# Astro Week 3 Monday Notes ASTR 103

Marketplace > Western Washington University > Astronomy > ASTR 103 > Astro Week 3 Monday Notes
Anjali Grutzius
Western Washington University
GPA 3.2

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These notes cover Monday's class and a quick overview of Friday's. Reviewing Kepler's laws and intro to Newton's Laws.
COURSE
Intro to Astronomy
PROF.
Mike Kraft
TYPE
Class Notes
PAGES
1
WORDS
CONCEPTS
astronomy, Science, motion, Physics
KARMA
25 ?

## Popular in Astronomy

This 1 page Class Notes was uploaded by Anjali Grutzius on Thursday September 29, 2016. The Class Notes belongs to ASTR 103 at Western Washington University taught by Mike Kraft in Fall 2016. Since its upload, it has received 21 views. For similar materials see Intro to Astronomy in Astronomy at Western Washington University.

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Date Created: 09/29/16
Astronomy 103 Week 3 Friday class last week was Activity Worksheet #6 10/3/2016 Homework due Wednesday Exam on Friday, multiple choice Kepler’s laws describe how planets revolve around the Sun. Not why. His laws are observational. What do we need to describe why one object revolves around another? • Gravity • Observation tells us that objects interact with each other • Through the force of gravity Force • A push or pull • A force acts on a object • Pushes or pulls area applied to something. • From the object’s perspective, it has a force exerted on it. • A force requires an agent, something that acts/exerts power. If you throw a ball, your hand is the agent, cause of the force. • A force is a vector. • To quantify a push or pull, we need to specify both magnitude and a direction. Newton’s Laws • 0 Law: A force is an interaction, a push or pull, between 2 bodies. • 1 Law: An object that is at rest will remain at rest. An object that is moving will continue to move in a straight line with constant velocity, if and only if the net force acting on the object is zero. nd • 2 Law: F=ma of a=F/m units are in Newton’s, N=kg m/s^2 • 3 Law: Forces come in pairs, acting on both objects involved in the interaction. Explaining Kepler’s Laws with Newton’s Laws

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