• 5th/6th
• Chapter 6 Review due
• Go over problems
• *Intro. to chapter 7
• Circular motion: defining centripetal acceleration and centripetal force
• Why centrifugal forces are fictional forces
• 7th
• Chapter 6 Review due
• Go over problems

Friday, January 11

• 5th/6th
• *Example problems with centripetal accelerations and centripetal forces
• Centripetal forces are always supplied by some other force like tension, friction, springs, etc.
• 6th period: Chapter 6 Test
• 7th
• Chapter 6 Test

Monday, January 14

• 5th
• *Example problems with centripetal accelerations and centripetal forces
• 7th
• Circular motion: defining centripetal acceleration and centripetal force
• Why centrifugal forces are fictional forces
• Example problems with centripetal accelerations and centripetal forces
• Centripetal forces are always supplied by some other force like tension, friction, springs, etc.

Tuesday, January 15

• 5th
• Universal Gravitation - a primer (Keynote presentation)
• Why do astronomy? Predicting events is power! Stonehenge (1400 BCE), Zodiac (1000 BCE), Kings hired astronomers to figure out events. During colonial times astronomy was the only science taught.
• Tycho Brahe's observatories.
  • Given island of Hven by the king of Denmark and made very accurate observations of celestial bodies.
  • Had a fake nose because he lost his in a duel over who was a better mathematician.
  • Died at a party from a burst bladder.
• Kepler was Brahe's assistant. He wasn't much of an observer - childhood smallpox left him with weak vision but his ability as a mathematician was unrivaled. He first proposed elliptical orbits and took over some official duties Brahe had to some monarchs as court astrologer.
• Early models of the solar system
  • Ptolemeic - epicycles, etc was geocentric with all circles. If we revolved around sun then star background would grow and shrink as we get closer and farther away in our orbit.
  • Copernican - heliocentric with ellipses; phases of Venus sealed the deal that this is the way thing work. There is a huge problem with retrograde motion of Mars too.
  • Copernican not accepted because priests and parents most trusted people in life - you just can't tell people they are wrong. (The same is true with former teachers.)
• Kepler's 1st and 2nd laws
• 6th/7th
• Finish centripetal motion examples
• Universal Gravitation - a primer (Keynote presentation)
• Why do astronomy? Predicting events is power! Stonehenge (1400 BCE), Zodiac (1000 BCE), Kings hired astronomers to figure out events. During colonial times astronomy was the only science taught.
• Tycho Brahe's observatories.
  • Given island of Hven by the king of Denmark and made very accurate observations of celestial bodies.
  • Had a fake nose because he lost his in a duel over who was a better mathematician.
  • Died at a party from a burst bladder.
• Kepler was Brahe's assistant. He wasn't much of an observer - childhood smallpox left him with weak vision but his ability as a mathematician was unrivaled. He first proposed elliptical orbits and took over some official duties Brahe had to some monarchs as court astrologer.
• Early models of the solar system
  • Ptolemeic - epicycles, etc was geocentric with all circles. If we revolved around sun then star background would grow and shrink as we get closer and farther away in our orbit.
  • Copernican - heliocentric with ellipses; phases of Venus sealed the deal that this is the way thing work. There is a huge problem with retrograde motion of Mars too.
  • Copernican not accepted because priests and parents most trusted people in life - you just can't tell people they are wrong. (The same is true with former teachers.)
• *A tour of the solar system
• Kepler's 1st and 2nd laws

Wednesday, January 16

• 5th
• P. 219; 15–16, 19–22
• Hand in homework
• Tour of the Solar System
• Kepler's 3rd law
• 6th/7th
• P. 219; 15–16, 19–22
• Hand in homework
• Kepler's 3rd law
• *Circular motion lab

Thursday, January 17

• 5th/6th
• P. 219; 25–28 due
• Go over problems
• *Orbital example problems
• 7th
• P. 219; 25–28 due
• Go over problems

Friday, January 18

• 5th/6th
• Finish circular motion lab 20 minutes
• *Newton's universal law of gravitation examples
• Calculate the force of graviational attraction between:
  • A 40 kg boy and a 1.2 kg stapler 2.0 m apart.
  • A 40 kg boy and the Earth
  • The Earth and the Sun
  • A spaceship between Earth and the Sun at a distance of 2.5 x 10⁸ m from Earth
  • An asteroid 1.1 x 10⁸ m from Mars so that a line from it to Mars is perpendicular to the radius of Mars' orbit
• 7th
• Newton's universal law of graviation
• Example problems
  • Calculate the force of graviational attraction between:
    • A 40 kg boy and a 1.2 kg stapler 2.0 m apart.
    • A 40 kg boy and the Earth
    • The Earth and the Sun
    • A spaceship between Earth and the Sun at a distance of 2.5 x 10⁸m from Earth
    • An asteroid 1.1 x 10⁸ m from Mars so that a line from it to Mars is perpendicular to the radius of Mars' orbit

Monday, January 21 – No school – Martin Luther King, Jr. day

Tuesday, January 22

• 5th
• P. 220, 29 – 34 due
• Go over problems
• Why isn't Pluto a planet anymore?
• 6th/7th shortened periods (2 hour delay schedule) due to 4Sight testing
• P. 220, 29 – 34 due
• Go over problems

Wednesday, January 23

• 5th
• Kepler's 3rd Law examples
  • Derive K_earth = 9.89 x 10^-14 s²/m³
  • r for geosynchronous satellites
  • v for space shuttle if T=90 minutes
  • Mass of the sun if T_pluto =7.83 x 10⁹ s and r=5.91x10¹² m
• 6th/7th shortened periods (2 hour delay schedule) due to 4Sight testing
• Intro. to Gravity Lab
• Gravity Lab
• *Space shuttle video

Thursday, January 24

• 5th/6th
• Intro. to Gravity Lab
• Gravity Lab
• *Torque
• torque examples
• 7th
• Kepler's 3rd law examples
  • Derive K_earth = 9.89 x 10^-14 s²/m³
  • r for geosynchronous satellites
  • v for space shuttle if T=90 minutes
  • Mass of the sun if T_pluto =7.83 x 10⁹ s and r=5.91x10¹² m

Friday, January 25

• 5th/6th
• P. 220, 35 to 39 due
• Go over problems
• *Space shuttle video
• 7th
• P. 220, 35 to 39 due
• Go over problems

Monday, January 28

• 5th
• Science Course Selection for next year
• Work on homework and review
• 7th
• Pass out science course information
• Torque

Tuesday, January 29 – No school – Snow Day

Wednesday, January 30

• 5th
• Circular Motion Lab due
• P. 253, 1 to 6 due
• Go over problems
• 6th/7th
• Circular Motion Lab due
• P. 253, 1 to 6 due
• Go over problems
• *Cavendish balance (Weighing the Earth experiment) and why Pluto isn't a planet anymore
• Science course selection for next year
• Work on review and gravity lab

Thursday, January 31

• 5th/6th
• Review Due
• Go over problems
• *Space Shuttle challenger
• 7th
• Review Due
• Go over problems

Friday, February 1 – No School – Teacher Professional Development Day

Monday, February 4

• 5th
• *Chapters 7 & 8 Test
• 7th
• Chapters 7 & 8 Test