×

### Let's log you in.

or

Don't have a StudySoup account? Create one here!

×

or

by: Eva Malek

238

0

3

# ASTR 115 -Intro to Astronomy. Lecture Notes "Making Sense of Motion in the Universe, Part 2" 3/3/15 ASTR 115

Marketplace > San Francisco State University > Astronomy > ASTR 115 > ASTR 115 Intro to Astronomy Lecture Notes Making Sense of Motion in the Universe Part 2 3 3 15
Eva Malek
SFSU
GPA 3.46
Intro to Astronomy
Julio Magalhaes

These notes were just uploaded, and will be ready to view shortly.

Either way, we'll remind you when they're ready :)

Get a free preview of these Notes, just enter your email below.

×
Unlock Preview

This are the class notes from March 3 ASTR 115 class. Topics: Making Sense of Motion in the Universe, conservation laws, Newton's Universal Law of Conservation. It also includes the answers for ...
COURSE
Intro to Astronomy
PROF.
Julio Magalhaes
TYPE
Class Notes
PAGES
3
WORDS
KARMA
25 ?

## Popular in Astronomy

This 3 page Class Notes was uploaded by Eva Malek on Saturday March 7, 2015. The Class Notes belongs to ASTR 115 at San Francisco State University taught by Julio Magalhaes in Spring2015. Since its upload, it has received 238 views. For similar materials see Intro to Astronomy in Astronomy at San Francisco State University.

×

## Reviews for ASTR 115 -Intro to Astronomy. Lecture Notes "Making Sense of Motion in the Universe, Part 2" 3/3/15

×

×

### What is Karma?

#### You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 03/07/15
Astronomy 115 Lecture Notes 332015 Making Sense of Motion in the Universe Part 2 Conservations Laws Express fundamental properties of the Universe Conservation means some quantity remains constant unless exchanged between objects as a result of an interaction 9Conservation of linear momentum total momentum remains the same before and after a collision 9Conservation of Angular Momentum Angular momentum mass X velocity X radius Total angular momentum never changes It can only change by exchanging it with another object Planetary motion example 9 Interpret s Kepler s second law equal areas Planet keeps orbiting unless another object comes along to change its angular momentum Earth Distance is longer r diameter is smaller Velocity is V velocity is greater smaller Law of conservation of Energy Energy cannot be created or destroyed it can only be transferred from one object to another or transformed from one type to anther Energy the capacity to create change Forms of energy 9 kinetic energy motion 9Potential energy stored energy 9Radiant energy energy of light 9Thermal energy kinetic energy of the molecules in a substance at a microscopic level temperature Temperature scales Kelvin Celsius Fahrenheit 37515 100 212 27315 0 32 0 27316 45967 Gravitational Potential Energy energy of position in a gravitational field of an object Kinetic energy potential energy constant Higher Kinetic Energy when closer to the sun Earth Higher gravitation I I 39 Lower graVItatlonal potentlal energy potentlal energy Newton s Universal Law of Conservation Every object in the universe attracts every other object with a force proportional to both of their masses and inversely proportional to the square if the distance between them Fgravity G M1 x M2 d2 G universal constant M1 mass object 1 M2 mass object 2 d distance between center of objects Gravity Attractive force between any two objects Never goes to zero It s universal Lecture Tutorial Newton s Law and Gravity pages 29 32 answers 1 The Strength of the gravitational force that the moon exerts on the Earth is equal to the gravitational force that Earth exerts on the moon The equation FG GMmr2 shows that there is just one force Fa between two objects This is consistent with Newton s third law whenever an object exerts a force on a second object the second object exerts an equal and opposite force on the first 2 Student 1 is correct It uses Newton s third law 3 If the mass of the Moon were made two times greater than its actual size the gravitational force between the Moon and Earth would be two times larger 4 The gravitational force by Earth on the spaceprobe is strongest at the surface of Earth Reducing the distance between object makes the gravitational force larger 5 The gravitational force by Mars on the spaceprobe is strongest at the surface of Mars 6 The spaceprobe will experience the greatest net or total force when it is closest to the more massive planet Earth 7 At the halfway point the strength and direction of the gravitational force on the spaceprobe by Earth is stronger than the gravitational force on the spaceprobe by Mars The gravitational force is always attractive which will cause these forces to be in opposite directions and since the combined mass of Earth and the spaceprobe is greater than the combined mass of Mars and the spaceprobe while the distance between the spaceprobe and each planet is the same the force on the probe by Earth will be greater 8 Student 2 is correct see answer 7 9 If the spaceprobe had lost all ability to control its motions and was sitting at rest at the midpoint between Earth and Mars a The spaceprobe would start moving toward Earth since the gravitational force is greater b The spaceprobe would speed up as it moves toward Earth c The net or total force on the spaceprobe would be increasing as the probe moves closer to the more massive Earth and farther from the less massive Mars d The spaceprobe would experience the greatest acceleration where it would experience the greatest net force from Newton s second law net force equals mass times acceleration which is at the surface of Earth 10 Somewhere closer to Mars than the halfway point since the net force needs to be zero For the net force to be zero it must experience a force toward Earth that is exactly the same strength as the force it feels toward Mars 11Less because the gravitational force is less

×

×

### BOOM! Enjoy Your Free Notes!

×

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

## Why people love StudySoup

Steve Martinelli UC Los Angeles

#### "There's no way I would have passed my Organic Chemistry class this semester without the notes and study guides I got from StudySoup."

Kyle Maynard Purdue

#### "When you're taking detailed notes and trying to help everyone else out in the class, it really helps you learn and understand the material...plus I made \$280 on my first study guide!"

Steve Martinelli UC Los Angeles

#### "There's no way I would have passed my Organic Chemistry class this semester without the notes and study guides I got from StudySoup."

Parker Thompson 500 Startups

#### "It's a great way for students to improve their educational experience and it seemed like a product that everybody wants, so all the people participating are winning."

Become an Elite Notetaker and start selling your notes online!
×

### Refund Policy

#### STUDYSOUP CANCELLATION POLICY

All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email support@studysoup.com

#### STUDYSOUP REFUND POLICY

StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here: support@studysoup.com

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to support@studysoup.com