Overview of this Course:

#### Syllabus Fall 2018 Homework Problems: (from 3rd ed. of Knight) Ch 1 through 14 Ch 15 through 17

Textbook: *Any Calculus-based introductory book!* You decide. Former textbook: Physics for Scientists and Engineers, **3rd Edition**, by Randall D. Knight. Conceptual Questions Questions used in Lecture Practice Tests *(past exams are not predictive of future exams) *Exam1 Fall 2011(.pdf) Answers Exam2 Fall 2012 (.pdf ) Answers Exam3 Fall 2011 (.pdf) Answers

Physics 121 is a *calculus-based* introductory physics course that discusses kinematics, dynamics, simple harmonic motion, gravity, fluids & elasticity, and Thermodynamics. Calculus is used freely and frequently, so if you have not taken or are not currently enrolled in calculus, you should enroll in Physics 111k.

I will try to do whatever I can to show you the beauty of physics and to help you broaden your appreciation of the natural world by helping you understand not *why* it is as it is, but *how it works. *Some of you will be well-prepared, having had physics and calculus previously, and may not have to work so hard as those of you concurrently taking calculus for the first time. Expect to put in a good 8-12 hours per week (at minimum!) to do well in this course. For lectures to be valuable, you should read relevant topics BEFORE class. And when I say *reading*, I mean you read and work out mathematical steps as you go to make sure you understand what's written. *Reading* a physics book is an active process, it's not like reading a novel.

**Friday LA Session Worksheets:** (posted Friday after class)

Week 1 Week 2 Week 3 Week7 Week8 Week9 Week10 Week11: A & B

**Solutions **(posted on Mondays)

Week 2 Week 3. Week7 Week8 Week9 Week10 Week11

**Physics 121 2018 Learning Assistants**

Gauruv Aryal: gauruv.aryal@maine.edu

Evan Combes: evan.combes@maine.edu

Kallee Gallant: kallee.gallant@maine.edu

Mackenzie Libby: mackenzie.libby@maine.edu

Dominic Pelletier: dominic.pelletier@maine.edu

**Physics 114X Learning Assistants:**

Cade Schurz: cade.schurz@maine.edu

Emily Wall: emily.wall@maine.edu

**Tutoring Hours in Room 250 Science:**

Monday: 9:00 to 13:00

Tuesday: 10:00 to 13:00 & 15:00 to 17:00

Wednesday: 8:00 to 10:00 & 15:00 - 16:00

Thursday: 10:00 to 13:00 & 15:00 to 17:00
Friday: 10:00 to 15:00

Correction to answers in back of 3rd edition of Knight’s text:

2.43 part c: t = 10.5 seconds (not 11.5)

3.11 part d: angle should be -71.6 degrees

3.19 part b: should be 2.8i - 1.0j

3.25 Should be Cx= - 4.94 & Cy = -1.9

4.17 Change answer to: a.) 50 m b). 2.2 m/s

5.35 (b) Should be 20 m/s^2, not 30.

6.69 (c) Book’s answer is totally bogus! They did not give an initial velocity, so the

best you can do is to calculate the acceleration -7.84 m/s^2

7.17 tension at midpoint = 9.8 N

12.19 Net torque should be 5.0 N m

12.25 Problem means that rotation axis is through cm of SYSTEM. (i.e. NOT through the geometric center of the rod)

13.27 Net force should be 6.09e-7 N in y direction