Force and more force
Notice:
If anyone wishes to take Physics 121, in Burnaby, during the summer, let me know.
Fan Cart Experiment
Experiment acceleration mass mC mC +mB mC mC +mB force FL FL FH FH Low speed, cart a = 0.28 m/s2 LC only Low speed, cart a =
Dynamics I
Motion along a line
Weight
m g(Y)
g(X)
The earth pulls all objects towards its centre. The force is its weight, Fgrav, or w. It depends on 1. m, the object mass (doesnt depend on location) s 2. g(r), the gravitational strength where it is Fgrav
Gravity
-Newton's Universal Law- Not "what it is" but "what it does".
m1
What Gravity Does
F All objects pull all other objects The forces on two objects are r equal in magnitude opposite in direction Proportional to masses of each object m 1m 2 F Inverse
Rotations
Linear Motion
Kepler's 2nd Law Equal areas are swept out in equal times.
vt vrt vrt x vrt r vt vt
Central Force
Kepler's 2nd Law Equal areas are swept out in equal times.
v2=(Fc2/m)t v rt v t v1=(Fc1/m)t v rt x v rt v t r
v is the component of
Momentum and Impulse
Conservation Laws
Impulse
Fracket on ball
When the racket hits the ball F(t)racket on ball = F (t) ball on racket Time interval from ti to tf is the same Fr on b = mb (dvb/dt) Fr on b dt = mb dvb Dene Impulse
tf
Impulse
J on ball =
ti
Forces
Galieo Galilei
Would it go on forever?
Frictionless Puck
Dry ice inside
Hole in bottom lets CO2 gas form a cushion
Nearly frictionless motion gives a uniform velocity.
Elastic loop shows force
no force
force
v = (2.4cm/flash ) t
2
More force
v = (
Relativity
Galileo and Einstein Time dilation Length contraction
Two coordinate systems
xyz displaced by X = X z X y (x,y,z) y z
x
x
Two coordinate systems
xyz displaced by X = X z X y z (x,y,z) y
x x = xX y = y z = z
x
Two coordinate systems
xyz moving a
Spring 2005
D1: MWF 9:30
Dr J. Thewalt
Office: SSB 8103
PHYSICS 102-3*
General Physics II
TEXTBOOK:
"Physics: Principles with Applications"
Author: Giancoli (6th ed)
Publisher: Pearson
COURSE DESCRIPTION:
A general survey course for life science students.
Concepts of Motion
The goal of chapter 1 is to introduce fundamental concepts of motion
Berenice Abbott
Displacement Velocity
!t = ?
General Strategy
Motion Diagrams
General Strategy
Time
Operational Denition: Choose a periodic process as a time
standar
Ch. 2: Kinematics The Mathematics of Motion in a Straight Line
Goal: Learn how to solve problems about motion in a straight line.
Motion DiagramGraph
8 7 6 5 4 3 2 1 x (m) 6 5 4 3 2 1 0 1 2 3 4 5 t (s) 6 7 8 9
Average Velocity
6 x (m) 5 4 3 2 1 0 1 2 3 4
Physics 102 2005-1
VECTOR ADDITION
Written assignment: (10 marks) due Jan 21, 2005 at 8:30 am
Please answer the following question clearly, step-by-step, starting with a careful
diagram.
Hand it in to the appropriate wooden box marked Phys 102 (A-L or M-Z
Phys102 Assignment Cover Sheet
First Name:_ Last Name:_
Mark: _
Student ID:_
Section: _
Date: _
Phys102 Written Assignment #7
Textbook (Giancoli, SFU edition), page864, question #72.
72.
A slab of thickness D, whose two faces are parallel, has index of re
Phys102 Assignment Cover Sheet
First Name:_ Last Name:_
Mark: _
Student ID:_
Section: _
Date: _
Phys102 Written Assignment #5
Due Wed/Thur Oct 27/28, by the end of your tutorial.
Textbook (Giancoli, SFU edition), page728, question #31.
31. Suppose the Ear
Phys102 Assignment Cover Sheet
First Name:_ Last Name:_
Mark: _
Student ID:_
Section: _
Date: _
Phys102 Written Assignment #6
Due Wed/Thur Nov 3/4, by the end of your tutorial.
Textbook (Giancoli, SFU edition), page756, question #58.
58. A long horizontal
Phys102 Assignment Cover Sheet
First Name:_ Last Name:_
Mark: _
Student ID:_
Section: _
Date: _
Phys102 Written Assignment #7
.
Textbook (Giancoli, SFU edition), page864, question #72.
72.
A slab of thickness D, whose two faces are parallel, has index of
Phys102 Assignment Cover Sheet
First Name:_ Last Name:_
Mark: _
Student ID:_
Section: _
Date: _
Phys102 Written Assignment #8
Due Wed/Thur Dec 1/2, by the end of your tutorial.
Textbook (Giancoli, SFU edition), page 947, question #19.
19. Two 0.010-mm-wid
Collisions
One can use the explosion of a spring between two carts (like you did in the lab) to measure the mass of
an unknown object. Suppose that both carts have the same mass, m, which is known and that the
unknown object has mass M. Thus the cart carr
Phys102 Assignment Cover Sheet
First Name:_ Last Name:_
Student ID:_
Mark: _
Date: _
Phys102 Written Assignment #1
Due Friday Sept 17, 10:30am.
Textbook (Giancoli, SFU edition), page 587, question #38.
(a) Determine the electric field E at the origin O in
PHYSICS FORMULAS
cfw_Do not write on thts I)
CONSTANTS MATH FORMULAS
g = 9.80 mts
n=3.14
rm: 543: km
mm am] x 1:)" Kg
c=3.x1'ma'5
6:6.67x10" N n'kg
H_=26xm.ukg
c=V 32+ b'-2abcos C LawofCoslna
1116. =lm'a' =M Law of Slnes
th=ala4x1u=mg a b c
c = 205: .1ng
8Fh rsph @FCsxFRsr&vCCFre"Ct FiphCubr&FSu jw v ed u y w ce hi e `t e i xcc de `t w ` he w e bt ed e c t w w u c v y e `t th `t wc tced i w y uec h ed e y h th `t y w cc h i e `t d y e hi ce d e `t et x h Xph Se8wvXtr&rC"zdhCF$eCnXspC&ssAFa"n"zwxpt$Fpdhdhg
Physics 120
Term Test #1
Friday October 15, 2004 This exam sheet is double-sided. Please attempt all questions. Only a basic, non-programmable calculator is allowed. You have approximately 50 minutes to complete this test. Your work must be neat and easy
Physics 120
Some Sample Term Test #2 questions
I could not nd a copy of the second term test from the last time I taught this class. Below are some appropriate problems I have created over the years which cover the relevant material, most of these questio
PHYS 102 Midterm examination #1 (Version 1B)
October 15, 2004
Name_
Time: 50 minutes
Student No._
Please show complete solutions and explain your reasoning, stating any principles that
you have used.
*
1(5/20 marks). Two charges q1 = +2.0nC and q2 = -4.0n
PHYS 102 Midterm examination #1 (Version 1A)
October 15, 2004
Name_
Time: 50 minutes
Student No._
Please show complete solutions and explain your reasoning, stating any principles that
you have used.
*
1(5/20 marks). Two charges q1 = +2.0nC and q2 = -4.0n
PHYS 102 Midterm examination #1 (Sample)
October 15, 2004
Name_
Time: 50 minutes
Student No._
*
1(4/20 marks). An equilateral triangle with side a=6.0cm has a charge Q=2.0C at each
vertex.
(a) Find the electric potential at the centre of the triangle.
(b)
Phys-120 (Midterm2) Date: Mar. 13th 2015 (# of points: 20 + 4 bonus)
Name:
Student ID:
Tutorial session:
Answer all questions in the booklet that has been provided. A coherent presentation is
expected as part of your solution. Full credit will not be assi