Physics 140, Fall 2010 First Midterm Exam
Physics 1)epartment, University of Michigan
October 7, 2010
FORM 1
Please print your name:
c k EJJ
Your iNSTRUCTOR:_
INSTRUCTIONS AND INFORMATION
1. Fill in YOUR NAME, INSTRUCTOR and the EXAM FORM NUMBER on the sc
Physics 140, Fall 2010
First Midterm Exam
Physics Department, University of Michigan
October 7, 2010
FORM 1
Please print your name: _
Your INSTRUCTOR:_
INSTRUCTIONS AND INFORMATION
1. Fill in YOUR NAME, INSTRUCTOR and the EXAM FORM NUMBER on the scantron.
Announcements/Reminders
Today is the deadline for dropping courses.
Deadline for Mastering Physics MP-02 is tomorrow at 11:59 pm.
Applications of Newtons Laws
Lecture 6:
Chapter 5, Sections 5.1- 5.3 of the Text
Friction Forces
Contact force- force where t
phys 140 9/11
3.53:
y = 0 = h + 0 - 1/2gt^2
t = sqrt(sh/g) = sqrt( 2* 90 / 9.8) = 4.29s
d = Vx * t = 64 * 4.29 = 274.6 m
3.3: magnitude of the dots average velocity between t=0 and t=2s
position of r = (4+ 2.5t^2 )i + 5t j
r0 = 4i
r2 = 14i + 10 j
(10i + 1
Vectors
(i) scalar product A * B
(ii) vector product A x B
Relationships between displacement, velocity, acceleration
Displacement is a vector r = xi + yj + zk
average velocity =
dr
dt
Motion with constant acceleration
v(t) = v_0 + at
x(t) = x_0 + v_0t +
Physics 140 - Discussion 05 - Solutions
4.20. IDENTIFY: Weight and mass are related by on location. SET UP: On earth, g = 9.80 m/s2 . EXECUTE: (a)
w = m, g
w = mg .
The mass is constant but g and w depend
which is constant, so
wE wA = . wE = 17.5 N, g E =
Physics 140 - Discussion 04 - Solutions
3.35. IDENTIFY: Relative velocity problem in two dimensions. His motion relative to the earth (time displacement) depends on his velocity relative to the earth so we must solve for this velocity. (a) SET UP: View th
Physics 140 - Discussion 03 - Solutions
3.3.
r (a) IDENTIFY and SET UP: From r we can calculate x and y for any t. Then use Eq. (3.2), in component form. r EXECUTE: r = [4.0 cm + (2.5 cm/s 2 )t 2 ]i^ + (5.0 cm/s)t^ j r ^. At t = 0, r = (4.0 cm) i r At t =
Physics 140 - Discussion 02 - Solutions
2.23. IDENTIFY: Assume that the acceleration is constant and apply the constant acceleration kinematic equations. Set |ax | equal to its maximum allowed value. SET UP: Let + x be the direction of the initial velocit
Physics 140 - Discussion 01 - Solutions
1.42. IDENTIFY: Find A and B. Find the vector difference using components. SET UP: Deduce the x- and y-components and use Eq. (1.8). r EXECUTE: (a) A = 4.00i^ + 7.00 ^; Ax = +4.00; Ay = +7.00. j
r 2 ^ A = Ax2 + Ay =
First Midterm
Today Clock starts at 6:00 pm; be in your seat at 5:50 pm Location: MLB (next to clock tower), Auditorium 3 Alternate seating; no seating outside the columns Must have UM ID and #2 pencil(s) Closed-book, 90 minutes, multiple-choice, 20 ques
Racquetball Striking a Wall
Collisions
General Physics I Mechanics Physics 140
Stewart Hall
Mt. Etna
Collisions
Defining a Collision
In a collision, forces between two objects are large and last for a short time During that time, they are often much larg
Racquetball Striking a Wall
Momentum and Impulse
General Physics I Mechanics Physics 140
Stewart Hall
Mt. Etna
Conservation laws and symmetry
What is the main reason the energy is conserved? Emmy Noether (1882-1935) showed that conservation laws are clos
Midterm 1 - Results
Racquetball Striking a Wall
Potential Energy
General Physics I Mechanics Physics 140
Stewart Hall
Mt. Etna
Work-Energy Theorem
Wtot = KE
The work on the left-hand side of this equation is the total work done by all forces acting on a
First Midterm
This Thursday, February 2 Clock starts at 6:00 pm; be in your seat at 5:50 pm Location: MLB (next to clock tower), Auditorium 3 Alternate seating; no seating outside the columns Must have UM ID and #2 pencil(s) Closed-book, 90 minutes, mult
Rotational Dynamics
Torgue and Angular Acceleration
Lecture 15:
Chapter 10, Sections 10.1-10.2
Force was essential to give a body acceleration. In rotational dynamics, the
force is required also but in such a way as to give the body a turning or
twisting
Announcements/Reminders
Midterm Exam 1 is on Thursday, October 2 at 6:00 pm.
Names starting with A L in 170 Dennison
Names starting with M Z in 182 Dennison
Exams consists of 20 multiple choice questions, all of equal value.
You will have 90 minutes to co
What do we mean by ethics?
Preparation for ethics workshop
For our purpose, ethics means several
things:
Read the ethics chapter (posted in RESOURCES: Ethics
material) and the ethics lecture notes (posted in
RESOURCES: Lecture Notes)
systems for analyz
MEMORANDUM
Date:
January 10, 2017
To:
Elizabeth Hildinger
Instructor, College of Engineering
George Wynarsky
Instructor, College of Engineering
From:
Nnamdi Ejike-Nwogu
Student, College of Engineering
Subject:
The implantable cardioverter defibrillator as
History and Development of the Coronary Stent
Outline
Balloon Angioplasty (Percutaneous Transluminal Coronary Angioplasty PTCA)
encompassed by Percutaneous Coronary Intervention (PCI)
o /*Originated in ?
1977 Andreas Gruentzig performs first cath lab PT
Announcements/Reminders
Midterm Exam 1 is on Thursday, October 2 at 6:00 pm.
Names starting with A L in 170 Dennison
Names starting with M Z in 182 Dennison
Exams consists of 20 multiple choice questions, all of equal value.
You will have 90 minutes to co
Momentum and Impulse
Lecture 11:
Chapter 8, Sections 8.1 8.2 of the Text
Let us revisit the 2nd Newton law:
(8.1)
In Eq.8.1 we have defined a vector quantity p called momentum.
[p] = kg m/s
(8.2)
If we integrate the expression Fnet = dp/dt, we obtain
(8.3
Announcements/Reminders
The deadline for Mastering Physics # 04 is tonight at 11:59 pm.
Discussion # 10 Potential Energy
Q7.3: Does an objects speed at the bottom of a frictionless ramp depend on
the shape of the ramp or just on its height? Explain. What
Announcements/Reminders
The deadline for MP-Assignment 00 is tomorrow at 11:59
pm
Lecture 2:
Motion Along a Straight Line
Chapter 2, All Sections of the Text
Mechanics divides into two main topics
t2
t1
0
x1
Displacement
kinematics = description of motion
Announcements/Reminders
The deadline for Mastering Physics MP # 6 is tomorrow at 11:59 pm.
Lecture 13/Discussion 13:
Center of Mass
Chapter 8, Section 8.5
So far, we have considered a single particle. But often we have several particles
comprising a syste
Lecture 1:
Vectors
Chapter 1, All Sections of the Text
Scalar - just a number with a unit, e.g., mass, temperature, time, density,
Vector both a magnitude and direction must be specified, e.g., displacement.
B
A
the same magnitude and direction.
Equalit
Entire class average: 73.66%
In terms of the gravitational potential energy (we will simply call it potential energy), the work W g
is given as
Note, that what matters is the difference U. Thus, we are free to choose the origin from which
to measure the p
Lecture 12: Collisions
Chapter 8, Sections 8.4
Collisions
We often encounter situations where the internal forces are much stronger than the
external forces. If this is so, we can then neglect the external forces altogether.
Collisions represent such situ
Racquetball Striking a Wall
Application of Newton's Laws
General Physics I Mechanics Physics 140
Stewart Hall
Mt. Etna
Clicker Question
Leaving class early en masse is A. Disruptive to the class B. Disrespectful to your classmates C. Detrimental to your