Welcome to PHYSICS 220 Section 2 Prof Yulia
- Slides: 23
Welcome to PHYSICS 220 (Section 2) Prof. Yulia Pushkar – – – – Lecture 1 Kinematics Forces Energy and Momentum Rotations Fluids Oscillations/Waves/Sound Thermodynamics Purdue University, Physics 220 1
Textbook The textbook is College Physics, Vol I, by Nicholas J. Giordano (Brooks/Cole). We will cover almost all of the topics in this volume, at a rate of one chapter per week! Very Fast! Come prepared! Lecture 1 Purdue University, Physics 220 2
Course Web Site http: //www. physics. purdue. edu/phys 220 • Course Syllabus – Policies – Grading scheme – Exams & i. Clicker exercises • Lab Syllabus • Tentative Class Calendar – Pre-lecture reading assignments – Homework due dates • CHIP User’s Guide – Homework – Grades Lecture 1 Purdue University, Physics 220 3
Class Format • Lecture Section 2: – – – Time: Monday, Wednesday 11: 30 - 12: 20 Lecture Room: PHYS 114 Instructors: Prof. Yulia Pushkar Office Hours: 5 -6 pm on Monday and Wednesday Office: PHYS 70 Phone: 49 -63279 Email: ypushkar@purdue. edu (please include on the subject line: PHYS 220) • Recitation Section 2: – – Time: Friday 11: 30 - 12: 20 Instructor: Deepak Pandey Office Hours: Friday: 12: 30 AM - 5: 30 PM Office: PHYS 11 A Phone: 49 -43018 Email: dpandey@purdue. edu CHIP coordinator: Dr. V. K. Saxena, PHYS 176 • Laboratory: – Coordinator: Dr. A. Lewicki, Office: PHYS 142 – Lab Room: PHYS 121 Lecture 1 Purdue University, Physics 220 4
Homework • We will use CHIP (Computerized Homework In Physics) for homework assignments • The homework is due by 10 am on Fridays • Homework is computer graded – 100% if completed before the deadline – 75% if completed within three days of the deadline – 50% if completed after three days but within one week of the deadline – 0% after one week past the deadline – There is a limit on the number of attempts allowed. Lecture 1 Purdue University, Physics 220 5
i. Clicker • We will use i. Clicker for interactive lecture and recitation exercises – One point for participating in each exercise – Two points for each correct answer • i. Clicker can be purchased at the Purdue bookstore • Registration: – You must register your i. Clicker on CHIP! • http: //www. physics. purdue. edu/academic_programs/courses/icli cker_register. pdf – Deadline: by the end of this week • We will start to use i. Clicker next week! Lecture 1 Purdue University, Physics 220 6
Exams and Grades • Exams: – There will be two midterm exams and one final exam. All exams are closed-book. The final exam will be cumulative. – Exam 1: Feb 16, 2011, 6: 30 – 7: 30 PM – Exam 2: Mar 29, 2011, 6: 30 – 7: 30 PM – Final: TBA (2 hours) • Grades: – The final grade will be determined on the following basis: • 300 points final exam • 300 points two evening exams (150 points each) • 150 points laboratory • 100 points CHIP homework • 50 points recitation exercises • 100 points lecture exercises – No excused i. Clicker exercises. – You must pass the lab in order to pass the course. Lecture 1 Purdue University, Physics 220 7
Tips • Pre-lecture reading – Come to the lectures prepared! • Things to pay attention to – Concepts, connections, motivation: Lecture – Problem solving: Recitation + Homework – Hands-on lab • Taking notes – Lecture notes can be downloaded from the course web site – But they are sketchy … you need to fill in details in class • Post-lecture reading – See if there are still things you do not understand • Seeking help – See us during office hours! – Physics Help Center Lecture 1 Purdue University, Physics 220 8
Today’s Lecture • • • What is physics? Problem Solving Scientific notations and significant figures Units of measure Math of Physics – Algebra, Geometry – Vectors • Motion Lecture 1 Purdue University, Physics 220 9
Why is it cool to study Physics? • The science of matter and energy, and the interactions between them – Matter and energy are fundamental to all areas of science • The study of the natural or material world and phenomena – Meaning of physics from the Greek for Nature • Natural philosophy – Oldest science – All scientists were originally physicists
Problem Solving Strategies • Recognize the key physics principles – Need a conceptual understanding of the laws, how they are applied, and how they are interrelated • Sketch the problem – Show the given information / include a coordinate system • Identify the important relationships – Use the given information and the unknown quantities to determine what laws apply • Solve for the unknown quantities • What does it mean? – Does the answer make sense? – Dimentional analysis
Dealing With Numbers – Scientific notation – Significant figures
Scientific notation Number of people leaving on the Earth (2007): 6, 600, 000 or 6. 6 x 109
Scientific notation Prefix (abbreviation) Power of Ten Peta (P) 1015 Tera (T) 1012 Giga (G) 109 Mega (M) 106 Kilo (k) 103 Hecto (h) 102 Deci (d) 10 -1 Centi (c) 10 -2 Milli (m) 10 -3 Micro ( ) 10 -6 Nano (n) 10 -9 Pico (p) 10 -12 Femto (f) 10 -15
Significant figures – show accuracy Your height is: (A) 5. 9 ft (B) 5. 90 ft B is more accurate than A, as its result contains more significant figures. Implies that true value lies between 5. 89 ft and 5. 91 ft A digit is significant if it is meaningful with regard to the accuracy of the value
Significant Figures in Calculations • Multiplying and dividing – Use the full accuracy of all known quantities when doing the computation – After completing the calculation, round the answer to the number of significant figures present in the least accurate starting quantity – Example: 976 x 0. 000064 m = 0. 062464 m~ 0. 062 m • Due to the 2 significant figures in the 0. 000064
Significant Figures What is the perimeter of a circle of radius 1. 2 m? L = r x 3. 1415926 … x 1. 2 = 7. 539822 … m L = 7. 5 m What about: 3. 1415 + 0. 1 = 3. 2415 or 0. 1415 - 0. 02 = 0. 1215? Ans: 3. 2 or 0. 12 Lecture 1 Purdue University, Physics 220 17
Units • To communicate the result of a measurement for a quantity, a unit must be defined! – Defining units allows everyone to relate to the same fundamental amount. – Always write down units and carry the units through all of the calculations. • We use the SI system – Length: meter (m) – Mass: kilogram (kg) – Time: second (s) 1 meter = 3. 281 ft 1 kg = 2. 205 pounds • Dimensional Analysis: – Both sides of an equation must have the same units. – Can be used to verify equations, answers. Example: density [kg/m 3] = m [kg] / V [m 3] Lecture 1 Purdue University, Physics 220 18
Trigonometry Generally will use only right triangles Pythagorean Theorem r 2 = x 2 + y 2 Trig functions (r=hypotenuse) sin θ = y / r cos θ = x / r tan θ = y / x Trigonometric identities sin² θ + cos² θ = 1 Other identities are given in appendix B and the back cover • To find an angle, you need to use the inverse of a trig function If sin θ = y/r then θ = sin-1 (y/r)= ascsin(y/r) • Angles in the triangle add up to 90° α + β = 90° • Complementary angles sin α = cos β
Vectors vs. Scalars • A scalar is a quantity that requires only a magnitude (with unit) • A vector is a quantity that requires a magnitude and a direction (is represented by arrows)
Vector Representation • The length of the arrow indicates the magnitude of the vector • The direction of the arrow indicates the direction of the vector with respect to a given coordinate system • Vectors are written with an arrow over a boldface letter • Mathematical operations can be performed with vectors: add, subtract, multiply by constant.
Adding Vectors Draw the first vector Draw the second vector starting at the tip of the first vector Continue to draw vectors “tip-to-tail” The sum is drawn from the tail of the first vector to the tip of the last vector
Adding Vectors Using Components • Assume you are adding two vectors: • To add the vectors, add their components Cx = A x + B x Cy = A y + B y • Then the magnitude and direction of C can be determined Ax = A cos θ; Ay = A sin θ
- Purdue physics 220
- Yulia puskhar
- The ninny by anton chekhov
- Yulia newton
- Nano coloumb
- Yulia pushkar
- Yulia ayriza
- Yulia school
- Yulia andreeva
- Yulia brovkina
- Photo caption
- Welcome welcome this is our christmas story
- Modern physics vs classical physics
- University physics with modern physics fifteenth edition
- Good physics ia topics
- Pounds to kg formula
- Decrease 220 by 15%
- Definer 220
- Kazutora hayashida
- Ece 220 uiuc
- Cse220
- Dice one
- Kmeler
- 220-901 dumps