PHYSICS 203

Lecture: Fall, 2017

Profs. Daniel A. Martens Yaverbaum & Joseph Walters

LAST UPDATED october 30, 2017

Procedures & Policies

 

SUBMIT !

TOPIC READING PROBLEMS EQUATIONS/RELATIONS/CONCEPTS

The Importance
of
Definitions

&

Some Important
Definitions:

Vectors & Scalars

Displacement & Velocity

Average Speed
&
Average Velocity


No Reading Assigned
Prior to First Lecture.

For all subsequent lectures,

Any Reading,
Writing or
Problem-Solving

Found in a Row
of this calendar

Is Due on the Date
found in that Same Row.

* * *

Introductory Reading
FROM First Lecture:

1. Physics Is About . . .

2. Train of Thought

No Problems Due for First Class

IN BRIEF & INEXACTLY:

Distance: how far?

Displacement: how far & what direction?

Speed: how fast?

>

Velocity: how fast & what direction?


I. Moments & Changes

Velocity at an Instant;

Velocity at the Next Instant.

Acceleration:
A rate of change in a rate of change


II. Aboard the Train of Thought.

Skim:
Chapter 1

Read:
2-1, 2-2, & 2-3

Due:

1. Number Line

2. Average Speed

3. Train of Thought

As you work on these assignments, please keep in mind the explanations of distance, displacement, speed, & velocity provided in the box diagonally up-right from this one. (Distance = "how far?", etc.)

When answering a question that asks for a vector quantity (e.g. velocity, displacement), try, if possible, to give a direction in words.
"10 meters WEST" or "10 meters SOUTH" are much better answers than just "-10 meters."

 


Print & Bring to Class:

1. Average Acceleration

2. Midpoint Velocity

3. Free Falling Up

Do NOT overlook the HW GUIDES linked in the Feb 22nd assignment box!!

Can you translate each of the above equations into words?

Into a complete and coherent statement about motion...
one which, perhaps, you can visualize?
Maybe not yet, and that's not unusual,
but translating, picturing and 'modeling' ARE the real goals!

Memorization can only help so much.
All equations in the box above are given to you on the first page of your exams.

Basic guide to notation

       

Average Acceleration,

Constant Acceleration

&

Free-Fall

Read:
2-4, 2-5, & 2-6

Solutions? (TBP)

SOME SOLUTIONS:
(Number Line, etc.)

 

Some More Solutions!

 

Due:

1. Midpoint Velocity

2. Free Falling Up

3. Begin working on
Big Ol' Duck (and others)

GUIDE to Midpoint Velocity

GUIDE to Free Falling Up

The green links above are HELP FILES for Midpoint Velocity & Free Falling Up. Please use them!


Print & Bring to Class:

1. Big Ol' Duck (and others)

2. Space Relations - Part 1

HINTS for Space Relations Part 1

(You don't have to print the hints; but please use them when doing the assignment at home.)

 

 

Read:
3-1

Free Falling Up Solutions



INDEPENDENCE of AXES,

GPR #1 brought to Higher Dimensions:

The Laws Hold in every Uniform Reference Frame,

A Reference Frame is a Coordinate System. . .

Coordinate Systems comprise Axes. . .

READ:
3-2 and 4-1 to 4-4
in the textbook

Big Old Duck

Solutions

(Note: solution to the final problem not included.)


PRACTICE MIDTERM 1

 

SOLUTIONS

to PRACTICE EXAM for

MT 1, F17

 

 

GPR


Ptolemy

to Galileo

to Newton:

The history

& practice of

RELATIVITY

 

IMPORTANT REMINDERS:

1.
v ≠ v-bar
Don't confuse them!

2.
v ≠ Δx/t.
If you write v = Δx/t (without a bar over the v) or equivalent on the exam, I will deduct points.

3.
When dealing with two dimensions (e.g. in a projectile problem) keep axes separate, i.e. apply equations to ONE AXIS AT A TIME.

4.
Free fall acceleration (g) is approximately 10 m/s^2 downwards (on the y-axis.) An object in free-fall (such as a projectile) has a horizontal acceleration of 0.

5.
You will need pencils and a SCIENTIFIC calculator for the exam.

 

 

HOW TO STUDY
  1. Try all the problems in the practice exam.
  2. Carefully study the solutions (linked above) to any problems you didn't get right.
  3. Set the solutions aside and try the problems again on your own.
  4. Keep doing this until you can get them all right without looking at the solutions
  5. Change the numbers in the problems and see if you can solve them with the new numbers.
  6. AFTER you have done all this, if you have more time, go back and study old homeworks

Looking for more practice? Try this exercise.




Practice Many Problems


Galileo's Principle of Relativity

 Form #1: The laws of physics hold in all unaccelerated reference frames*.

Form #2: No experiment can measure the velocity (speed & direction) of a solitary object; the velocity of an object cannot be measured in comparison to space itself.

Form #3: Velocity (speed + direction) is a relation, not a property; the motion of one object is not meaningful without comparison to another object.

*A reference frame is a perspective. More precisely, a reference frame is a coordinate system defined in relation to an observer that moves with the motion of the observer.

       

The Mighty Second Law

and its graphic auxiliaries

A.K.A.

Unfolding the Net Force

 

 

Due:

1. Big Ol' Duck (and others)

2. Space Relations - Part 1

HINTS for Space Relations Part1


 

 

 

Read: 5-1

Galileo's Principle of Relativity, Form #5

Commonly knwn as
Newton's First Law of Motion

Unless acted on by a net external force, an object at rest stays at rest and an object in motion stays in motion at the same speed and in the same direction.

 

 

 

Newton's Second Law of Motion:

 






   

SOME Tips

ALL SOLUTIONS

to PRACTICE EXAM for

MT 1, F17

the missing PART E!
(from part II, q 1)


Generalized Problems,

Sliding Resistance,

&

Diagonal Forces

Read: 5-2

Due:

1. Space Relations - Part 2

2. Particular Projectiles

EXTRA CREDIT:

Generalized Projectiles



Newton's Third Law of Motion

If object A exerts a force on object B, then object B exerts a force on object A of equal magnitude and opposite direction.


*
MIDTERM1

*

FOLLOWED BY

Choosing your coordinate system wisely:

Slanted accelerations,

Slanted axes,

Accelerating Slants

DUE:

System Schema & Free-Body Diagrams

Read: 5-3

 

 

 


DUE:

 

Newton's 2nd Law:
Part 1

 

 

SOLUTIONS TO MIDTERM 1   SOLUTIONS TO MIDTERM 1

Lab Interlude:

BOARD MEETING
ALPHA

 

VELOCITY VECTOR ADDITION  

Ketchup:

1) Space Relations,

Part I

2) Space Relations,

Part II

3) System Schema

&

Free-Body Diagrams

(Intro to Newton's Laws)

 

 



 

THE Boat/River

Velocity Problem*

 

* ( For Extra Credit, f

yet NOT optional.)

 


N-II.2

GUIDE to N-II.2

The green-background link above is a HELP FILE for N-II.2. Please use it!

 

 


READ: 4-5, 6-3, 7-1, 7-2

 

DUE:

N-II.3

GUIDE to N-II.3

 





Practice EXAM 2

(from S17)

Is NOW online!
There are only three problems.
You should do all of them.

Use any resources you like.
Work with others.
But your final work must be your own.
It must be clear.
It must demonstrate understanding.

May the net force be with you!

PRACTICE MIDTERM
Use this GUIDE for Part III, Question 1
Use this GUIDE for Part III, Question 21

Accelerating at constant speed

Circular Motion

The radial & tangential axes

DUE:

EXAM 2

Transition: Linear to Circular

Print & Bring to Class:

1. Linear to Circular II

2. Curves & Work

DUE:

N-II.1

Problem III.A, in N-II.1, is designed to help you figure out how to calculate the force of gravity on an object, given its mass. If you get stuck on this, the answer is in the textbook reading .


Work work work

(& energy!)

Forces across space.

The integral

READ: 7-3, 7-4, 7-5

 

DUE:

1. Linear to Circular II

2. Curves & Work


Print & Bring to Class:

1. Work by Constant Forces

2. Work by Non-Constant Forces


Begin considering but do not submit:

EXTRA CREDIT: Retrodiction

Worried about your grade? This extra-credit assignment is a good way to get some extra points. But follow the directions CAREFULLY.

 



Forces across time.

Impulse & Momentum

Collisions & Explosions

READ: 8-1, 8-2

Curves & Work Solutions

 

DUE:

1. Work by Constant Forces

2. Work by Non-Constant Forces


Print & Bring to Class:

1. Putting it All Together

2. Impulse Momentum Collision

3. Universal Gravitation

 








Newton's Law of Universal Gravitation

Physics on other planets

Free Falling Forever

Chapter 9 & 13-1

Solutions to
Roller Coaster & Bouncy Bouncy Bouncy
and
Universal Gravitation

Solutions to...
The PRACTICE FINAL
Parts 1 & 2
Part 3

 

DUE:

1. Putting it All Together

2. Impulse Momentum Collision

3. Universal Gravitation


IF you are submitting

EXTRA CREDIT: Retrodiction

it must be submitted BY THIS DAY


Print & Bring to Class:

PRACTICE FINAL

 










       

FINAL EXAM

Attempt problems.
Look at solutions.
Copy solutions.
Put solutions away.
Wait 30 minutes.
Try solutions again.


Unofficial Course Evaluation

REVIEW SESSION:

TBA
(The Physics Lab is where you have lab-- yes you, no matter which lab section you are in.)


Section 1 -> 3:30 pm - 5:30 pm

Section 3 -> 10:30 am - 12:30 pm;

Section 2 -> 10:30 am - 12:30 pm

 

Note: All assignments are 1) highlighted, 2) DUE the day on which they appear and 3)

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