10/30/09

Post date: Oct 30, 2009 1:40:9 PM

Bell Ringer: What is Work?

• • Work

    • What does "work" mean in your lives?

    • In physics, work = Force * distance, measured in Joules (J)

      • Force must be in same direction as motion for work to be done

      • Example: Lifting a weight vs. holding a weight.

      • Example: Stepping up on a chair

  • Page 199: 1-4

    • If force is NOT in same direction, first find the component of the force in the direction of the objects movement

      • Example: Lawn mower (page 200)

  • Page 202: 5-7