Physics 101 Hour Exam 3
December 1, 2014
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Physics 101 Hour Exam 3 December 1, 2014
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Physics 101 Hour Exam 2 November 3, 2014
-a.
Last Name: ,I I ' H First Name ID
, an.
Discussion Section: Discussion TA Name:
InstructionsTurn off your cell phone and put it away.
Calculators cannot be shared. Please keep yours on your own desk.
This is a
Physics 101.
Last Name:
Discussion Section:
Hour Exam 3
First Name
Discussion TA Name:
Summer 2010
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Instructions
Turn off your cell phone and put it away.
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This is a closed book exam
Lecture 03: Kinematics
Kinematics: Description of Motion
Position & Displacement
Velocity
average
instantaneous
Acceleration
average
instantaneous
Position
A vector quantity describing where you are
relative to an origin.
Point A is located at x=3, y=
Lecture 04:
Kinematics + Dynamics
Kinematics Equations
constant acceleration
Dynamics
Newtons Second Law
Non-zero acceleration
Equations for
Constant Acceleration
x = x0 + v0t + at2
v = v0 + at
v = v0 + 2a(x-x0)
2
2
x is final position
xo is initial posit
Physics 101: Lecture 12
2D Collisions and
Center of mass
Physics 101: Lecture 12, Pg 1
Question
Exam 1 was:
A. Too easy
B. Reasonable, but I made too many silly
mistakes
C. Too different from the practice exams
D. Too difficult
E. Just about right
Physics
Lecture 13:
Rotational Kinetic Energy
and Rotational Inertia
Review: Rotational Kinematics
Rotational Kinetic Energy
Rotational Inertia
Torque
Rotational Dynamics
Equilibrium
Recall: Rotational Kinematics
Angular
Linear
constant
a constant
0 t
v v 0 at
Welcome to Physics 101!
Lecture 01: Introduction to Forces
Newtons Laws
Forces
Free Body Diagrams
Newtons 1st Law of Motion
If the sum of all external forces on an object is zero, then its
speed and direction will not change. (Know as the Law of
Inertia.)
Lecture 02:
Forces & 2-D Statics
Springs
Tension
2-D Statics Examples
Contact Force: Springs
Force exerted by a spring: Fspring = k*x
The greater the compression or extension of the
spring, the greater the force.
The greater the spring constant (a charact
Lecture 14:
Rolling Objects
Rotational Dynamics
Rolling Objects and Conservation of Energy
Examples & Problem Solving
Rotational Form Newtons 2nd Law
= I
Torque is an amount of twist provided by a force
Sign: positive = CCW
Moment of Inertia is like ma
Exam 3
Physics 101: Lecture 13
Rotational Kinetic Energy
and Inertia
Physics 101: Lecture 13, Pg 1
Rotational Inertia, I
Tells how difficult it is get object spinning. Just
like mass tells you how difficult it is to get
object moving.
Fnet= m a Linear Mot
Exam 3
Physics 101: Lecture 14
Torque and Equilibrium
Exam2HelpSessionTomorrow910AM144Loomis
Physics 101: Lecture 14, Pg 1
Torque
WhatexactlyistorqueinnormalEnglish?
Rotational effect of force. Tells how
effective force is at twisting or rotating
an objec
Lecture 12:
Collisions and Explosions
Momentum Examples!
Problem Solving
Collisions (elastic & inelastic)
Explosions
Impulse and Momentum:
quick review
Momentum-Impulse Theorem
Ft I = pf - pi = p
For single object.
If F = 0, then momentum conserved (p = 0
Lecture 05:
Free Fall and Apparent Weight
Free Fall
Apparent Weight
Free Fall
Only force acting on object is GRAVITY
Newtons 2nd Law
F = ma
Fg = ma
-mg = ma
a = -g
(force of gravity is mg down)
(thus acceleration is g downwards)
Acceleration is ALWAYS
Lecture 07
Dynamics and Relative Velocity
Problem Solving: Dynamics Examples
Relative Velocity
Dynamics Problem Solving
Draw a Free Body Diagram
(FBD) for each Object
Write down F = ma for each
Object in each Direction
Solve for the Unknown(s)
Dynamics Ex
Physics 101: Lecture 05
Kinematics + Dynamics
Physics 101: Lecture 5, Pg 1
Position vs Time Plots
Gives location at any time.
Displacement is change in position.
Slope gives velocity.
Position at t=3, x(3) =
x (m)
3
Displacement between t=1 and t=5. x =
4
Physics 101 Discussion Week 2 Explanation (2011)
D2-2 Displacement
Before answering each question, let us describe the displacements of the professor.
Q0. What do you think are the key points of the problem?
(1) Displacements are vectors. Thus, on a plane
Physics 101: Lecture 06
Exam I
Two Dimensional Kinematics
Physics 101: Lecture 6, Pg 1
Brief Review Thus Far
Newtons Laws of motion
Kinematics
Dynamics
Today we work in 2 Dimensions!
Physics 101: Lecture 6, Pg 2 05
y
2-Dimensions
x
X and Y are
INDEPENDEN
Physics 101: Lecture 06
Exam I
Two Dimensional Kinematics
Physics 101: Lecture 6, Pg 1
Brief Review Thus Far
Newtons Laws of motion
Kinematics
Dynamics
Today we work in 2 Dimensions!
Physics 101: Lecture 6, Pg 2 05
y
2-Dimensions
x
X and Y are
INDEPENDEN
Physics 101: Lecture 07
Constant Acceleration and
Relative Velocity
Physics 101: Lecture 7, Pg 1
Relative Velocity
Sometimes your velocity is known relative to a
reference frame that is moving relative to the
earth.
Example 1: A person moving relative to
Physics 101: Lecture 07
Relative Velocity
Physics 101: Lecture 7, Pg 1
Relative Velocity
Sometimes your velocity is known relative to a
reference frame that is moving relative to the
earth.
Example 1: A person moving relative to a train, which
is moving r
Physics 101 Discussion Week 3 Explanation (2011)
D3-1. Velocity and Acceleration
A.
1: average velocity.
Q1. What is the denition of the average velocity v?
Let r(t) be the total displacement vector in time t. Then, the average velocity
v during this time
Physics 101: Lecture 10
Potential Energy & Energy
Conservation
Physics 101: Lecture 10, Pg 1
Example: Ball Toss
You toss a ball in the air.
What is the work done by gravity as
the ball goes up?
A) Positive
B) Negative
C) Zero
What is the work done by grav
Lecture 06:
Two Dimensional Kinematics
Vector Review
2-D Kinematics
Projectile Motion
2-D Problem Solving
X and Y are INDEPENDENT!
Break 2-D problem into two 1-D problems.
y
x
Vectors
Position, Velocity, and Acceleration are Vectors!
r x 2 y 2
2
2
a ax a
North America III
Monday, August 29, 2016
11:58 AM
Question: How do politics and economics mediate human-environment
interactions?
1. North American environmentalism
a. Two separate strands
i. Wilderness preservation
1) Not to be messed with by humans
ii
Geog 204
Midterm I Study Guide
The exam will consist of 14 multiple choice questions (3 points each) and 4 short
answer questions (about 8 points each). A Scantron form is not necessary. You can
bring one sh