9.4. Newtons Second Law for Rotational Motion A

9.4. Newtons Second Law for Rotational Motion A

9.4. Newtons Second Law for Rotational Motion A model airplane on a guideline has a mass m and is flying on a circle of radius r (top view). A net tangential force FT acts on the plane.

NEWTONS SECOND LAW FOR A RIGID BODY ROTATING ABOUT A FIXED AXIS

Moment of Inertia of point masses Moment of Inertia, I for Extended regularshaped objects

9.5 Rotational Work and Energy Work and energy are among the most fundamental and useful concepts in physics.

The force F does work in rotating the wheel through the angle . ROTATIONAL WORK The rotational work WR done by a constant torque in turning an object through an angle is

SI Unit of Rotational Work: joule (J) ROTATIONAL KINETIC ENERGY

Demo on Rolling Cylinders 9.6 Angular Momentum The angular momentum L of a body rotating about a fixed

axis is the product of the body's moment of inertia I and its angular velocity with respect to that axis: SI Unit of Angular Momentum: kg m2/s.

CONSERVATION OF ANGULAR MOMENTUM The total angular momentum of a system remains constant (is conserved) if the net external torque acting on the system is zero.

Demonstration on Conservation of angular momentum http://www.exploratorium.edu/snacks/momentum_machine.html

Problem A woman stands at the center of a platform. The woman and the platform rotate with an angular speed of 5.00 rad/s. Friction is negligible. Her arms are outstretched, and she is holding a dumbbell in each hand. In this position the total moment of

inertia of the rotating system (platform, woman, and dumbbells) is 5.40 kgm2. By pulling in her arms, she reduces the moment of inertia to 3.80 kgm2. Find her new angular speed.

Recently Viewed Presentations

  • Bohr Model & Lewis Dot Diagrams - Geneva High School

    Bohr Model & Lewis Dot Diagrams - Geneva High School

    Bohr Model continued….. Bohr models are used to predict reactivity in elements. Reactivity- how likely an element is to form a compound with another element.. When looking at Bohr models, we look at its valence electrons (the electrons on the...
  • Automated Job Notification

    Automated Job Notification

    Apache already implements per directory restriction capabilities - caveats pass word sent as plain text Restriction for the job_adm directory - Apache's .htaccess provides enough security for the traffic of this site Proto./Mockup / Process Combination of prototyping and a...
  • Critical Lens Essays - Pequannock Township High School

    Critical Lens Essays - Pequannock Township High School

    Techniques to consider: - Characterization - Theme - Conflict - Symbolism - Figurative language - Tone - Mood Your Critical Lens Quote "All conflict in literature is, in its simplest form, a struggle between good and evil" - Stephen King...
  • JAVA METHODS and CONSTRUCTORS JAVA Classes  The class

    JAVA METHODS and CONSTRUCTORS JAVA Classes The class

    UMBC CMSC 331 Java. JAVAMETHODS and CONSTRUCTORS. JAVA Classes. The . class. is the fundamental concept in JAVA (and other OOPLs) A class describes some data object(s), and the operations (or methods) that can be applied to those objects.
  • Title

    Title

    Delete this slidePresentation for parents / carers. These slides form an approximately 20-30 minute presentation for parents/carers about the importance of studying Mathematics post-GCSE. They can be adapted and used for a presentation to students and/or their parents/carers.
  • Westgard Multirule System

    Westgard Multirule System

    rules to assess if a system is in control use when at least 2 levels of control are run with the examination run cannot use with only one control Dr. Westgard Quantitative QC-Module 7 Westgard Multirule System Titles 12S rule...
  • UOW 2016 template

    UOW 2016 template

    UOW mandatory internship requirement - students must spend 20 days in a legal workplace (organised by or pre-approved by Law School) under supervision of practising lawyer. Set objectives, reflective journal. Firms, Legal Aid ALS, CLC's (IARC, RACS), barristers, Judges, Magistrates,...
  • Faculty of Medicine Public Health (31505291)الصحة العامة ...

    Faculty of Medicine Public Health (31505291)الصحة العامة ...

    It was estimated that in the Eastern Mediterranean Region in 2008: 52 000 women . and 510 000 newborns died due to pregnancy and childbirth complications. 50% of newborn babies were delivered away from health care facilities. ... NUT, RBM,...