1 / 12

Work

Work. WORK. The transfer of energy through motion Done when a force is applied to an object over a distance. TWO REQUIREMENTS FOR WORK. Something has to move The motion MUST be in the same direction as the applied force. CALCULATING WORK. WORK = (Force) * (Distance) W = F*d.

magee
Download Presentation

Work

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. Work

  2. WORK • The transfer of energy through motion • Done when a force is applied to an object over a distance

  3. TWO REQUIREMENTS FOR WORK • Something has to move • The motion MUST be in the same direction as the applied force

  4. CALCULATING WORK WORK = (Force) * (Distance) W = F*d

  5. UNITS FOR WORK & ITS COMPONENTS METRIC ENGLISH Force Newton (N) Pound (lb) Distance Meter (m) Foot (ft) Work Joule (J) Foot-Pound (Newton-Meter) (ft-lb)

  6. WORK EXAMPLE • A 900 N mountain climber scales a 100 m cliff. How much work is done by the climber? F = 900N W = F*d d = 100m W = (900N)*(100m) W = ?? W = 90,000 J

  7. POWER • The rate at which work is done • The amount of WORK per unit of TIME • How fast you do your work

  8. POWER CALCULATION POWER = Work Time P = W t

  9. UNITS FOR POWER & ITS COMPONENTS METRIC ENGLISH Work Joule (J) Foot-Pound Time Second (s) Second (s) Power Watt (W) Ft-lb/s (Joule/Second)

  10. POWER EXAMPLE A small motor does 4000 J of work in 20 seconds. What is the power of the motor in Watts? W = 4000 J P = W / t t = 20 s P = 4000J / 20s P = ?? P = 200 W

  11. OTHER UNITS FOR POWER • 1 Kilowatt (KW) • 1000 Watts • Used for Larger amounts of Power (Electric) • Example: 2460 Watts = ________ KW

  12. OTHER UNITS FOR POWER • 1 Horsepower (Hp) • Approximately 750 Watts • Used to describe the power of engines or machines • Example: 4500 Watt Engine = _____ Hp

More Related