Homework

- Reading Preparation
- Key Equations
- WebLecture
- Study Activity
- Chat Preparation Activities
- Chapter Quiz
- Lab Work

**Text Reading**: Giancoli, *Physics - Principles with Applications*, Chapter 8: 1-3

**8.1**: We can measure how far something rotates in degrees, rotations, or radians. 1 rotation = 360 degrees = 2π radians. Radian measurement allows us to easily compute the linear distance traveled by a point a distance**r**from the center of rotation. We can then calculate angular distance in radians, angular velocity in radians per time, and angular acceleration in radians per time^{2}and relate these directly to linear distance, velocity, and acceleration. The pertinent equations are given in the table below.**8.2**: We can use the same calculations to derive angular equivalents for the four equations we have been using to describe the relationships between displacement, starting and final velocities, acceleration, and time.**8.3**: We can now use the resulting equations to talk about the motion of objects that roll, rather than simply move in a circle. Just as we did with linear motion, we'll look first at kinematics and how angular displacement, velocity, and acceleration are related, then take up the application to rotational dynamics, or*torque forces*.

Linear (from chapter 2) | Angular |
---|---|

v = v_{0} + at |
ω = ω_{0} + αt |

x = v_{0}t + ½at^{2} |
θ = ω_{0}t + ½αt^{2} |

v^{2} = v_{0}^{2} + 2ax |
ω^{2} = ω_{0}^{2} + 2αθ |

v_{ave} = ½(v + v_{0}) |
ω_{ave} = ½(ω + ω_{0}) |

**Read the following weblecture before chat**: Inertia, Acceleration, and Force

Use the physics simulation ==>HERE<== to experiment with rotational motion concepts.

**Forum question**: The Moodle forum for the session will assign a specific study question for you to prepare for chat. You need to read this question and post your answer**before**chat starts for this session.**Mastery Exercise**: The Moodle Mastery exercise for the chapter will contain sections related to our chat topic. Try to complete these before the chat starts, so that you can ask questions.

- The chapter quiz is not yet due.

If you want lab credit for this course, you must complete at least 12 labs (honors course) or 18 labs (AP students). One or more lab exercises are posted for each chapter as part of the homework assignment. We will be reviewing lab work at regular intervals, so do not get behind!

**Lab Instructions**: Torsion Pendulum: Angular Momentum

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