HP Cycle 17

🟢 8: T 12/16 - uniform circular motion problems

Today, we'll spend time working through some circular motion example problems:

• car rounding a curve (if we didn't finish this last time)

• rotor ride

• Vertical Circles (extra presentation)

Vertical circles are an example of where gravity combines with some other force to account for the centripetal force.  Remember "centripetal force" is another word for NET force when going in a circle.  

With any remaining time, we may start looking at some problem solving.

Optional Extra Practice:  If you need extra practice on easy UCM problems, Circular Motion Practice worksheet (Ans:  1. (a) 8.77m/s2 (b) mass times 1a.  2. (a) 1.56m/s (b) mass times 8.11m/s2  (c) 8.11m/s2.  3. (a) 0.650 (b) no change.   Hard Circular Motion Problems.  (skip #9) ANSWERS.   - note: for #3a, an acceleration of “1g” is 9.8 m/s2, so an acceleration of 0.050g is (0.050)(9.8 m/s2).   

Homework:  Quiz on Uniform Circular Motion (horizontal & vertical) on Thursday, December 18th!  Finish rest of Formative Circular Motion (horizontal) by 10pm tonight - Wednesday, December 17th.  If you missed class or would like to review, check out these videos on vertical circles: 

🟩 8: W 12/17 -  📖 universal gravitation

Today, we'll talk about Newton's Law of Gravitation.  

• We'll first look at  Gravitational Interactions.  

• Then, we'll do a check-in activity on ✅ Formative.com.  

• Next, we'll introduce Newton's Gravitational Constant and do some calculations using 📖 Mastering Physics "UNIVERSAL GRAVITATION".  

• You'll have an opportunity to look at problem solving at the end of the period.  

💚❗8: Th 12/18 - 📖 orbits & problem solving

Quiz on Uniform Circular Motion (horizontal & vertical) TODAY!

Today, after the assessment, we'll start with one quick problem on orbits.  Then, we'll continue to do more problem solving on circular motion and orbits.