1 / 13

Rotational Motion of an Object

Rotational Motion of an Object. Physics Matters: Chapter 7. Rotational Motion. All Spinning Objects Axis of Rotation The line about which everything rotates. Speed of Rotation Period of rotation The time of a single complete rotation ( T) Frequency of rotation

phila
Download Presentation

Rotational Motion of an Object

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Rotational Motion of an Object Physics Matters: Chapter 7

  2. Rotational Motion • All Spinning Objects • Axis of Rotation • The line about which everything rotates. • Speed of Rotation • Period of rotation • The time of a single complete rotation (T) • Frequency of rotation • The number of cycles completed in a given time (f = hertz) • Period = 1/Frequency or Frequency = 1/Period • T= 1/f f=1/T

  3. Spinning • Angular speed •  = s/r ( is measured in radians) • For 360 degreed, s = 2r • 3600 = 2 radians • Angular speed = 2f

  4. Torque • Tangential force being applied times the perpendicular distance from the axis of rotation •  = Ftr

  5. Angular Momentum • Moment of inertia • In general, the farther away a mass is from the axis the greater its moment of inertia is. • I = kmr2

  6. Angular Momentum (Cont.) • Momentum of inertia times angular speed • L = I  • Conservation of Angular momentum • Direction of Rotation • The right hand rule

  7. Center of GravityCenter of Mass "All of science is nothing more than the refinement of everyday thinking."-- Albert Einstein

  8. Center of Gravity • Point of an object located at the average position of weight.

  9. Center of Mass • The Average position of matter

  10. Toppling • Toppling occurs when the center of gravity extends beyond the support base.

  11. Stability • Unstable – CG is lowered with displacement • Stable – work must be done to raise the CG • Neutral – displacement neither raises or lowers the CG

  12. Objects rotate around their center of gravity. Let’s try some activities!!

More Related