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### How can we solve problems using the formulas we derived from the definitions of average velocity and average acceleration?

posted Sep 21, 2018, 7:54 AM by Barbara Fortunato   [ updated Sep 30, 2018, 6:12 PM by Barbara Fortunato ]
2: Th 9/27, 5: Th 9/27, 7: F 9/28

Today, we'll try to derive other kinematics formulas from the definition formulas for average velocity and average acceleration.  After we derive these formulas, we can start using them for problems.  There are several reasons why we're doing this exercise... (1) It's important to know where these formulas we're using come from.  (2) It's important for you to know what I expect your solutions to look like for every problem - diagram, knowns & unknowns, accepted formula, algebraic manipulation to get an expression for the unknown, and finally a numeric answer.  (3) It's good practice for all the algebra we'll be using in this class.  We'll try to complete #1-3 on "It's Your Lucky Day" Packet during class.

Then, we'll talk about each of the five graphs in the Practice - Getting graphs from TTT data packet and how they were generated. We'll make connections to what we already know about graphic analysis of motion, what we did in lab, and what we learned from the "It's Your Lucky Day" Packet. We'll make sure we understand the process of linearizing graphs and what we gain by doing it.

Homework:  No homework weekend.  Lab Quiz Tuesday.  Also, by Tuesday:  Make sure you've completed #1-3 on "It's Your Lucky Day" Packet.  Check your Solution to #2 below.

#### It's Your Lucky Day #2

See below if you need a refresher on the solution to problem #3 from "It's Your Lucky Day" Packet.