Midterm 2 review How you will be seated What you need to bring Preparation of formula sheet Exam Strategy Review PHY 231

Exam Prepare formula sheet: one 8.5x11 sheet – both sides if needed Bring sheet , pens or pencils, and a calculator to this room during the normal lecture time. Also bring your student ID. You will be seated in a specific row. A seating chart will be displayed on the screen. You will be given a personalized exam with attached scratch paper. We will collect exam, bubble sheet, and scratch paper when you hand in the exam. We will also check your ID. We will insist on the time limit. Please do not force us to take the exam from you. Don’t forget to do the corrections set.

formula sheet Hopefully you have prepared a formula sheet and used it to solve review problems. If you have not, you can select formulae from the first pages of each of my lectures and add formulae or notes if you find it useful for solving problems.

Physics 231 Lecture 11 Main points of today’s lecture: Examples of energy and power Impulses: forces that last only a short time Momentum Impulse-Momentum theorem Momentum conservation Momentum and external forces

Physics 231 Lecture 12 Main points of this lect. Impulses Momentum conservation Isolated systems Totally inelastic collisions Main points of this lect.

Physics 231 Lecture 13 Main points of today’s lecture: Elastic collisions in one dimension: Multiple impulses and rocket propulsion. Center of Mass

Physics 231 Lecture 14 Main points of today’s lecture: Multiple impulses and rocket propulsion. Things that oscillate Mass and Spring Circular motion Simple harmonic motion

Physics 231 Lecture 15 Main points of today’s lecture: Simple harmonic motion Mass and Spring Pendulum Circular motion

Physics 231 Lecture 16 Main new points of today’s lecture: Description of circular motion in cylindrical coordinates (r,): First equations for circular motion: Centripetal acceleration: vt ac

Physics 231 Lecture 17 Main points of today’s lecture: Centripetal acceleration: Rotational motion definitions: Rotational kinematics equations: Rolling motion: vt ac

Physics 231 Lecture 17 Main points of today’s lecture: Rotational motion definitions: Rotational kinematics equations: Rolling motion:

Physics 231 Lecture 18 Main points of today’s lecture: Rotational motion definitions: Rotational kinematics equations: Rolling motion: Torque Equilibrium

Physics 231 Lecture 19 Main points of today’s lecture: Torque Newton’s second law for rotations: Equilibrium: Center of mass:

Physics 231 Lecture 21 Main points of today’s lecture: Angular momentum: Newton’s law of universal gravitation: Kepler’s laws and the relation between the orbital period and orbital radius.

Physics 231 Lecture 23 Main points of today’s lecture: Gravitation potential energy Tensile stress and strain Bulk stress and strain: Pressure in fluids: Buoyancy

Physics 231 Lecture 24 Main points of today’s lecture: Buoyancy Bernouli’s equation Viscous flow Poisseuille’s law

Physics 231 Lecture 25 Main points of today’s lecture: Bernoulli’s equation Viscous flow and Poisseuille’s law Transverse and longitudinal waves traveling waves Wave speed for a string

Physics 231 Lecture 26 Main points of today’s lecture: Viscous flow and Poisseuille’s law Transverse and longitudinal waves traveling waves Wave speed for a string Superposition and interference of waves; Reflection of waves. Sound waves: Sound intensity: I=P/A, I0=1x10-12 W/m2

Problem solving strategy Look through the exam and do the easiest problems first. On each problem, you can use the following “fool proof” procedure to solve the problem: Read the problem carefully. If necessary, draw a picture. Identify the physics principles that are involved in the problem. Identify the known values given in the problem and unknowns values you are expect to find. Choose the appropriate equations that can be used to get the unknown you are suppose to find. Count the number of equations and verify that the number of equations is at least equal to the number of unknown quantities that are in the equations. Solve.

Review I have selected 14 problems that illustrate the principles that are involved for problem sets 1-4. If I finish these problems, I will accept requests for additional problems as time allows. An answer key will be posted on the Physics 231 web site after the lecture for section 3

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