welcome to physics 211! · warm-ups 4% post-class ... has calculus assistance . great place to sit...

Mechanics Lecture 1, Slide 1

Physics 2111

Welcome to Physics 2111

Physics 2111

Unit 0


Outline Course Layout

• Blackboard Page

• Textbook Option/Sugguestions

• Grading System

• General Schedule

• Prelectures

• Homework System

Significant Figures/Unit Math

Mechanics Lecture 1, Slide

Welcome to Physics 2111

Everything is provided on our Blackboard page

SmartPhysics/

Flipit


Lab/Topic Schedule

We will not do

every lab in

the manual.

Please check

this schedule

to determine

which lab we

are doing.


Course Info


Blackboard

Blackboard gradebook is not

automatically updated.

Will be updated every two or

three weeks.


Prelectures (top 23) 3%

Checkpoints (top 23) 3%

Warm-ups 4%

Post-Class Homework (top 30) 10%

Classroom Questions 5%

Labs 5%

Weekly Exams (top 14) 20%

Exam (3 at 10% each) 30%

Final 20%

Total 100%

50%

“easy”

points

Grading


Official textbook – Openstax

University physics Vol 1

Available:

Download (free)

Online (free)

Hardback Edition ($49)

You will need access to do “Warm-ups”

Textbook


Knight - Wordy, lots of graphs and conceptual

explanations, students hated it six years ago,

some loved it last year.

Tipler - Explains things more mathematically, a

little heavy on the calculus. Our text until last year.

Young and Freedman – Pretty math heavy but

different than Tipler. We’ve never used it but some

students loved in in past years.

Schuam’s – A long list of example problems with very little explanation

Textbook Purchasing Options


Course Structure Online Prelectures (animated textbook, before lecture)

Online Preflights (check knowledge, before lecture)

Warmup (check knowledge, before lecture)

Lectures (clicker questions, during lecture)

Online Homework/Tutoring (aprox ½ week after lecture)

Weekly Quiz (repeat of homework question)

General Weekly Schedule

This

assignment…

is actually due here.

10% extra credit for

any portion completed

by Saturday.


Come and see me

Drop in drop-in tutoring 1 in our labs (schedule posted later)

Math Assistance Center (generally 8am to 8pm, MTWTh)

Setup appointment with student tutor in Learning Commons

Join Engineering Club/Robotics Team

Most solutions are online somewhere

Homework Help


Have the survey form stamped at the Learning Commons. (SRC 2101 by the Police window)

Math Assistance Area is also in Learning Commons. Also has calculus assistance . Great place to sit and do homework

Students that sign in for more than twelve (12) get extra credit.

Drop stamped survey off at my office by 8 September. Be prepared to chat for 5 minutes.

First Homework Assignment


Get homework done early (Saturday)

Go to Math Assistance Area more than 12 times

Go to science talks or advising sessions (posted)

Note: Almost everything you turn in counts towards your grade. Extra quiz? Extra homework assignment?

Extra Credit


36. If you could change only one

thing about the class, it would be:

“Do more complex problems in class like the ones we have on homework.”

“Spend more time doing problems in class.”


Propose of pre-lab questions is to encourage you to review the lab ahead of time.

Due at the beginning of the lab period and graded for reasonableness.

In Activity 3-2, how will you determine the force on the

cart?

Labs/Pre-labs

okay

wrong

Clickers


Do you have your i>clicker with you today?

A) Yes

B) No

C) Maybe

D) I like pudding

You will need your clickers starting today. (Part

of your grade.)

We will register them in a week or so, although

the data will still be recorded.

“You can only learn what you almost already know”


prelectures

warm-ups

lectures

Clicker Q

labs

homework

You

know it!

Start


Math Requirements

As in most engineering courses, you will

find that it is the setting up of the integral

or its limits that is difficult.

In general, we will not do calculus

more complex than:

or𝑑

𝑑𝑡𝑒−2𝑡


Uncertainty I

• Extremely important in engineering

and science

• Don’t imply you know more than

you.

• Sig figs are rough “rule of thumb”

on how to display uncertainty


Uncertainty II

When multiplying or dividing, always

use no more sig fig in answer than the

least significant measurement.

Example:

• 8.5 has two sig fig

• 13485.5 has six sig fig

• 13485.5/8.5 = 1600 (two sig fig)


Uncertainty III

• Learned in previous science classes?

• See me with questions or details are in

textbook

Example:

• 13485.5/8.5 = 1586 okay

• 13485.5/8.5 = 1586.529412 -2pts

• Egregious sig fig errors are wrong! Will

lose you points.

Question


Using correct sig fig procedures, what is the answer for:

35467.6/8.11 =

A) 43733.1689

B) 43733.16

C) 43733

D) 43700


Base Units

Base units for SI system

• Mass – kilograms

• Length – meters

• Time - seconds

Other units are “derived” from these

• Joule =

kilogram* meter * meter / second / second

Question


In a homework problem, you are asked to calculate the height of a physics teacher. What would be a reasonable answer?

A) 0.9 meters

B) 1.7 meters

C) 3.2 meters

D) 6.8 meters


Unit Math

You can multiply and divide units just like

you do numbers

Example:

If you go in a straight line at

60mph for 2 hours, how far did you

travel?

If you go in a straight line at

60mph for 2 minutes, how far did you

travel?


Example Problem

What is 60 miles/hour in meters/sec?

Unit Math


You can work backwards with unit math to see if you have the correct formula.

Question


A) 7/5 MR2 B) 5/8 M/R2

C) 2/3 M2/t2 D) 9/5 MR

E) None of the above are correct

You’re asked on the 2111 final exam to calculate the moment of inertia of an off-axis sphere. The units moment of inertia are kg-meter2. What is a possible valid formula for this value?

Here M = mass, R = radius of the sphere and

t = time of rotation.

Question


A) K = 3.0 x/t

B) K = 0.25 x3/t

C) K = 3.14 t/x3

D) K = 6.0 t3/x3

The units for x are meters(m). Units for t are seconds(s). The units for K are s/m3. Which of the following equations might be right?

welcome to physics 211! · warm-ups 4% post-class ... has calculus assistance . great place to sit...

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