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🔴❗2: T 10/13, 🟡❗4: T 10/13, 🔵❗5: T 10/13 - rotational kinematics
🔴❗2: T 10/13, 🟡❗4: T 10/13, 🔵❗5: T 10/13 - rotational kinematics
❗QUIZ on static equilibrium & tipping problems TODAY!
Today, if you have not already, start by watching the video below on rotational kinematic variables. Take notes while you watch! Understanding these concepts are EXTREMELY IMPORTANT in being successful in the rest of this unit, so take the time to rewind and rewatch as needed. (When Mr. Fullerton derives centripetal acceleration in minute 13, he talks about unit vectors. "I-hat" is a unit vector magnitude 1 in the x direction. "J-hat" is a unit vector magnitude 1 in the y direction. Unit vectors are really just multipliers which turn scalar magnitudes into vectors with direction.)
Fill out the handout first which will relate Translational & Rotational Kinematics Variables using what you learned in the video. Then, we'll do problems from Chapter 10 which will allow you to practice applying the rotational kinematics formulas.
Support: 3, 4, 10
Required: 6, 7, 14, 16, 22, 26, 28, 32
Enrichment: 8, 17, 31
Watch the following videos on center of mass. Although there are quite a few videos, each one is not very long.
Then, watch the following videos on finding the center of mass of an object. The first video shows you the theory on finding the center of mass. The second video shows you how to find the center of mass of an object using the summation. The third and fourth videos show you how to use the integral to find the center of mass. Sorry for the long homework.
⭐PSAT ⭐ Wednesday, October 14th⭐ No class⭐
⭐PSAT ⭐ Wednesday, October 14th⭐ No class⭐
🟥 2: F 10/16, 🟨 4: Th 10/15, 🟦 5: Th 10/15 - center of mass (discrete)
🟥 2: F 10/16, 🟨 4: Th 10/15, 🟦 5: Th 10/15 - center of mass (discrete)
Daily Check-in: center of mass summation (a similar example if you missed class)
Today, we'll collaboratively solve center of mass problems from Chapter 9:
Support: 2, 4
Required: Sample prob 9.02, 5, 7, 8, 15, 16, 17, 114, G65
Enrichment: 14, G66, G67
Some of these problems will require you to use the calculus and what you learned about different kinds of densities. If you finish the ones that don't require calculus, watch the homework videos below.
Homework: ❗Quiz on center of mass & rotational kinematics on Tuesday, October 20th. Watch the following two videos about how to find the center of mass of an extended object with calculus. Also, make sure that you're comfortable with Example 9-14 on page 223 of the Giancoli textbook.
❤️ 2: M 10/19 lab, 💛 4: F 10/16 lab, 💙 5: M 10/19 lab - center of mass integral & moment of inertia
❤️ 2: M 10/19 lab, 💛 4: F 10/16 lab, 💙 5: M 10/19 lab - center of mass integral & moment of inertia
Daily Check-in: center of mass integral
Today, we'll collaboratively finish solving center of mass problems from Chapter 9:
Support: 2, 4
Required: Sample prob 9.02, 5, 7, 8, 15, 16, 17, 114, G65
Enrichment: 14, G66, G67
And if you need a review of the center of mass integral that we did in class, watch my video:
HOUR 2:
Daily Check-in: translational vs. rotational variables
Today, we'll start by learning first about what moment of inertia is and then trying to figure out how to calculate the moment of inertia of different objects. We'll learn formulas for moment of inertia using a summation for discrete objects and then an integral for continuous bodies. With any time remaining, start problems from the next post. Demos: two different cylinders with the same mass but different moments of inertia; ring and solid disk rolling down ramp.
Homework: ❗Quiz on center of mass & rotational kinematics, and tipping next class - Tuesday, October 20th. If you have any questions about the lecture today, you may watch my video lecture, and make sure you watch the part about parallel axis theorem starting at minute 33.
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