DAY 19
Good morning,
Today you'll begin exploring the math and theory required to understand projectile motion. This is where your math skills will really be needed, so if algebra and trig aren't your strong area, you'll need to work really hard to make sense of everything. Don't give up! The hard things are the things worth knowing.... :-)
Mr. Alexander
Goals: SWBAT...
1. Learn to draw vector components using the tip-to-tail method.
2. Evaluate the sum of two or more vectors in two dimensions graphically
3. Determine the components of the vectors
4. Solve for the sum of two or more vectors algebraically by adding the components of the vectors.
WARM-UP: (10 min) End at 8:40am
I'm not here, so you'll need to be independently focused today.
1. Copy and complete: A vector has both ___________ & ____________
2. Vectors Addition: Imagine you and a friend are pushing a car directly west. You push with a force of 40N, and your friend pushes with a force of 55N. To find the resulting force (net force), would you add your forces or subtract them? What is the net force (magnitude and direction).
3. Vectors in Multiple Dimensions: An ant leaves home (the origin), walks 12cm due east, then turns and walk 8cm due south. Using a ruler. sketch the two displacement vectors, put them tip-to-tail as shown on CH5 page 120 (in the margin), and then find the ant's resulting distance from the origin using two methods:
A. calculate the resultant using the Pythagorean Theorem
B. measure the resultant using a ruler
4. Define intrinsic and extrinsic
CLASSWORK: (for each CW activity, think about which goal you are meeting. Also, think about how the activity you're doing helps you achieve that goal). Assignment #019A. TITLE: "Vector Notes & Practice Problems" For credit, you will be turning in your notes and worked practice problems (please show work & use GUESS method) at the end of the period via Google Classroom.
1. (5 min - end at 8:45AM) Similar to warm-up question #2, let's practice more vector addition. Look at pg 92, Figure 4-5, and answer the following:
a. What is the net force in scenario B, from two equal and opposite pushes?
b. What is the net force in scenario C, from two equal pushes in the same direction?
c. What is the net force in scenario D, from two unequal pushes in the opposite direction?
2. (10 min - end 8:55AM) Read pages 119-120 (LINK). Create two quiz questions for the reading (these can be multiple choice or short answer). You have 10 minutes.
2. (15min - end at 9:10AM) Notes: An Introduction to Tip-to-Tail Vector Addition: LINK
Answer the Edpuzzle Questions. Check your notes for completeness HERE
3. (15min - end at 9:25) Notes: Introductory Tip-to-Tail Vector Addition Problem.
Answer the Edpuzzle questions. Check your notes here: http://www.flippingphysics.com/uploads/2/1/1/0/21103672/0050_lecture_notes_-_introductory_tip-to-tail_vector_addition_problem.pdf
3. (10 min - end at 9:35) Practice Problems pg 121 1-3
4. (15min - end at 9:50) Notes: Introduction to Vector Components.
Answer the Edpuzzle questions. Check your notes here: http://www.flippingphysics.com/uploads/2/1/1/0/21103672/0052_lecture_notes_-_introduction_to_vector_components.pdf
5. (until end of class) Practice Problems pg 125 5-7 (can be done for HW)
6. Connect activities with goals. Which Activity matched with Goal #1?
***Need help with Cardinal Directions?***
Go here --> How to use Cardinal Directions with Vectors
HOMEWORK:
#019B: Textbook CH 5 pg 121 #4,
Take notes on: Introduction to Vector Components.
Answer the Edpuzzle questions. Check your notes here: http://www.flippingphysics.com/uploads/2/1/1/0/21103672/0052_lecture_notes_-_introduction_to_vector_components.pdf
Solve pg 125 5-7 (due next class)
#GOALS: SWBAT...
1.
2.
3. Demonstrate the actual motion occurring by interpreting p-t v-t and a-t graphs
WARM -UP
1. In the Position-Time Graph, describe the motion illustrated by lines A-E
2. In the Velocity-Time Graph, describe the motion illustrated by lines A-E (hint, these will be different from #1)
CLASSWORK
1. Notes
2. Next Class
Walking Through Graphs
Quiz
HOMEWORK
Finish Position-Velocity-Acceleration Graph interpretation (LINK)
Review Example Problem #2 from pg 63, then solve pg 64 #6 & 7
Quiz on Intro to Acceleration. Review your notes, the figures from pg 58-62, any bold vocab terms,
and the problems you did for HW (pg 61 1-5)
***Here's the answers to 1-5:
1: --------->-------->------>---->-->• Acceleration is to the left
2. ----->----->--->-->-->>•--->-------->-------->
3. a. 5-15s b. 0-5s c. 15-20s
4. a. 2.0m/s2 b. -1.2m/s2 c. 0m/s2
5. _______________
/ \
/ \
/ \