Physics 6A, Winter 2015
Prof. Maha AshourAbdalla
Page 1 of 20
4. Newtons Laws and Force
In the seventeenth century Sir Isaac Newton formulated three laws of motion as well as a
set of equations from which we can calculate the motion of bodies under the i
Physics 6A, Lecture 4
Physics for Life Science Majors:
Mechanics
David Schriver
Week 4
Fall Quarter 2016
Week
Dates
Chapter
Topics
0
Sept. 23
1
Introduction, Measurement
1
Sept. 26 30
2
Kinematics in One Dimension
2
Oct. 3 7
3
Kinematics in Two or Three D
Physics 6A, Shaked
Name _
Exam #1
ID _
August 18, 2014
First, try to relax. Write down what you are stressed about on the back of this test.
Remember this is only worth 20% of your grade, and you can replace it with p
Physics 6A
Name _Answer Key_
Practice Exam #1
ID _
April 16, 2014
Section _
This Practice Exam is ~45 times longer than the real exam.
Closed notes, closed book. No calculators allowed. (If you really want to pr
Physics 6A, Shaked
_
Name
Exam #1
_
ID
October 20, 2015
Discussion time when you want to pick up
your exam _
Please close your notes, books and calculators. You can keep scratch paper out.
If anything is unclear, you can ask the TA, but the TA cannot tell
IMPORTANT INSTRUCTIONS to aid in scanning in all
your work:
1. We will not look at any work on the back of any sheet,
so only write on the front.
2. Write your name and ID number on the front of every
sheet.
3. Hand in all pages in the order given.
4. Whe
Midterm 2 Review Session
Closed book
will provide equation sheet, dont bring your own
bring any type of calculator (except for phone calculators),
you will need it
Four problems each with multiple parts
each problem worth total 25 points with multipl
2/3/16
Example 513: Conical pendulum.
Reading: Chapter 6
TODAY:
o Work and Energy
Homework #5:
due on Monday next week
This week office hours:
Wednesday 11amnoon
Thursday 12pm
A
B
C
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suspended by a cord of length l,
revol
Physics 6A, Lecture 4
Physics for Life Science Majors:
Mechanics
David Schriver
Week 5
Fall Quarter 2016
Week
Dates
Chapter
Topics
0
Sept. 23
1
Introduction, Measurement
1
Sept. 26 30
2
Kinematics in One Dimension
2
Oct. 3 7
3
Kinematics in Two or Three D
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Physics 6A
Chapter 11
Angular Momentum
Vah Peroomian
Angular Momentum
Angular momentum is the rotational
equivalent of the momentum p of a particle:
! ! ! !
!
L = r p = r mv
L = r(mv)sin
A particle need not be
undergoing circular motion
to have ang
Direction of a Vector
If vector is in first quadrant,
then its easy to
calculate the angle it makes with the x axis:
Ay
= tan
A
1
x
but what if the vector isnt
in the first quadrant?
Direction of a Vector
If vector is in second quadrant,
then A
Physics 6A
Chapter 9
Linear Momentum
!
Vah Peroomian
Linear Momentum
!
!
!
p mv
If two cars have equal mass, then the one with
higher speed has greater momentum.
A truck has more momentum than a car going
the same speed.
The more momentum an object has
Physics 6A
Chapter 10
Rotational Motion
!
Vah Peroomian
Rotation of a Rigid Body
About a Fixed Axis!
Arc length along direction
of rotation
r
Perpendicular distance of
a point from the axis of
rotation.
Angular position, given
by = / r. is measured
in rad
Physics 6A
Chapter 5
Using Newtons Laws
!
Vah Peroomian
Sections not Covered
!
You will not be responsible for the following
sections from Chapter 5:
Sections 5.5 and 5.6
Forces of Friction
!
Leonardo da Vinci empirically worked out the two friction laws
Physics 6A
Chapter 3 Part 1
Vectors
Vah Peroomian
Scalars and Vectors
Scalar: An ordinary algebraic quantity, such as
mass, temperature, speed, or time.
Vector: A quantity which has both a magnitude
and a direction, such as velocity, force, electric
Physics 6A
Chapter 7
Work and Energy
Vah Peroomian
A System Approach
to Energy
Identify a system for the problem were solving. A system
is a small part of the Universe, and helps us identify
internal and external influences.
A valid system
o may be a