Do Now (A): Type I Give 5 examples of One- Dimensional Motion

Do Now (B): Type II List the 5 formulas for One- Dimensional Motion

Do Now (C): Type II What is the final velocity of a frictionless object dropped from rest from a height of 12.5 meters?

In Class EXAM Re-DO Jet Sled Homework: 1 – 10 ALL Multiple Choice

SHOW WORK Footnote Sources (text pg 140, or www.physicsanswers.romac

Unit 7 Gravity Lesson WB

https://www.youtube.com/watch?v=UExTN3_UOIY

WEDNESDAYDec 9th 2015Period 5In Class Pages 191 – 194#’s 43,45,46.62,63,65,71,72,81,96

Physics Due MONDAY Dec 14 Pages 191 – 194#’s 43,45,46.62,63,65,71,72,81,96

"The more I practice the luckier I get."

From the Earth to the Moon to SETIHomework : Page 189Create Summary Sheet from VOCAB 7.1 & 7.2

Physics Due MONDAY Dec 14 Pages 191 – 194#’s 43,45,46.62,63,65,71,72,81,96

"The more I practice the luckier I get."

ForcesF = ma Newton’s = Kg (m/s2)You must know how to do these actions:•Calculate applied Forces using Average (net) Accelerations •Calculate net Forces using instantaneous and average (net) Accelerations •Calculate Frictional Forces using constant Accelerations •Calculate average velocities using net Forces with constant (net) Accelerations •Calculate distance and times using net Forces with constant (net) Accelerations

GravityYou must know how to do these actions:•Centripetal force of orbiting objects •Find Orbital Radii of an object •Find Orbital Periods of an object •Find Escape and orbital Velocities •Geo-synchronized orbits , •Gravitational force between two celestial objects •Gravitational Accelerations and velocities of celestial objects •Gravitational acceleration on the surface of a celestial body •Weights (in Newton’s) on other celestial bodies

Unit 7 Gravity Lesson one

Unit VII Gravity Kepler’s Laws of Planetary Motion

(Ta2 /Tb2 ) = (Ra3 /Rb3)Newton’s Laws of Gravity

F gravity = (G * m object * m planet) / r planet 2

Orbital Velocities and Escape velocities You must know how to Calculate:

Centripetal force of orbiting objects F = m* V2/R

Orbital Radii of an object {Ra3 } = (Ta2 {Rb3} /Tb2 )

Orbital Periods of an object (Ta2 ) = ({Ra3 * Tb2 } / {Rb3})

Escape and orbital Velocities V = R (g/r+) or V = (G * Mplanet) /r+)Geo-synchronized orbits Period “T” = 24 hours (around Earth)Gravitational force between two celestial objects Fgrav = G (M1 * M2) / d2

Gravitational Accelerations and velocities of celestial objects

Gravitational acceleration on the surface of a celestial body“g” = (G * m planet) / r planet

2

Weights (in Newton’s) on other celestial bodies F gravity = Weight = m object *”g” = (G * m object * m planet) / r planet

2

Unit 7 Gravity Lesson one

•Kepler’s THIRD Law of Planetary Motion (Period of Orbiting Object “A” / Period of Orbiting Object “B”)2 =(Radius of Orbit for Object “A” / Radius of Orbit for Object “B”)3

Newton’s Laws of Gravity F gravity = (G * M 1 * M 2)/ (d

2)F gravity = (G * Mass1 * Mass2 )/ (distance between M1 and M2)

2

"G” = 6.67 X10-11 Nm2/Kg2

F gravity = (m * “g”) = (mass times gravitational acceleration) = Weight

F centripetal = m v2 / R (R and d are sometimes used interchangeably when talking about orbits)

AB

(TA / TB)2 = (RA / RB)3

Gravity & KEPLER

GravityUnit 7 Gravity Lesson Two

Name:______________ Two MAJOR Flaws 1)

2) Five Minors “oops”

1 2 3 4 5

Can you find them?

Homework: List 5 scenes where “gravity” was in effect What is the “g” that Sandra Bullock is experiencing if she is at the Hubble orbit (roughly 200 kilometers above the surface of the Earth )

“g” = (G * m planet) / {r Orbit + r planet 2 }

GravityUnit 7 Gravity Lesson THREE

Two MAJOR Flaws Five Minors oops

Did you find them?

Homework: What is the “velocity ” that Sandra Bullock is

travelling at if she is at the Hubble orbit (roughly 200 kilometers above the surface of the Earth )?

V = R (g/{r Orbit + r planet 2 }) or V = (G * Mplanet) /({r Orbit + r planet

2 })

- F = ma- Weight = m”g”- Fgrav = G (M1 * M2) / d2

-“g Planet” = (G * M Planet) / (Radius Planet)2Escape and orbital VelocityV = R (g/r+) or V = (G * Mplanet) /r+)r+ = orbital radius of satellite (ADDED TO PLANET RADIUS)

Orbital period and radius(Ta/Tb)2 = (Ra/Rb)3

Orbital distance from the Moon to Earth : 0.3844 X106 KmRadius of the Earth : 6,378.140 km (or 6,378.140 X 103 meters)

Do Nowa) What are five “things’ you know about Gravity

b) What is the orbital period of Saturn around the Sun if it’s major orbital radius is 1.43 X10 12 m

Do Nowa) How many

Earths will fit into the Sun?

b) What is the orbital velocity of the international space station orbiting 500.00 Km above the surface of the Earth?

Do NowWhat is the orbital Radius of a geosynchronous weather satellite above the surface of the Earth?

DO NOW:A)TURN IN

HOMEWORKB) Centripetal Force is defined as F centripetal = m (v2

/ r).

What is the centripetal force on The Moon in orbit around the Earth?F centripetal =______________ ___

Unit 7 Lesson 7 http://www.badastronomy.com/bad/movies/contact.html

Unit 7 Lesson 8 test

Gravity Test Do Now: Test

Homework: How Many astronauts (US-USSR-Chinese-other) have died in space or in training?

Active {Split Page} Read chapter 9.1 Define and give an example of:

IMPULSE Momentum Impulse – Momentum Theorem Angular Momentum

Do Practice Problems 1 – 5 ODD page 233