1 / 8

Rotational Work and Energy - Definition, Kinetic Energy, and Example

This chapter explains the definition of rotational work and energy, as well as how to calculate rotational kinetic energy. An example involving rolling cylinders is provided to illustrate the concept. The conservation of energy in rotational systems is also discussed.

joneskim
Download Presentation

Rotational Work and Energy - Definition, Kinetic Energy, and Example

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. Chapter 9 Rotational Dynamics

  2. 9.5 Rotational Work and Energy

  3. 9.5 Rotational Work and Energy DEFINITION OF ROTATIONAL WORK The rotational work done by a constant torque in turning an object through an angle is Requirement: The angle must be expressed in radians. SI Unit of Rotational Work: joule (J)

  4. 9.5 Rotational Work and Energy

  5. 9.5 Rotational Work and Energy DEFINITION OF ROTATIONAL KINETIC ENERGY The rotational kinetic energy of a rigid rotating object is Requirement: The angular speed must be expressed in rad/s. SI Unit of Rotational Kinetic Energy: joule (J)

  6. 9.5 Rotational Work and Energy Example 13 Rolling Cylinders A thin-walled hollow cylinder (mass = mh, radius = rh) and a solid cylinder (mass = ms, radius = rs) start from rest at the top of an incline. Determine which cylinder has the greatest translational speed upon reaching the bottom.

  7. 9.5 Rotational Work and Energy ENERGY CONSERVATION

  8. 9.5 Rotational Work and Energy The cylinder with the smaller moment of inertia will have a greater final translational speed.

More Related