L11 Dynamics: Motion in Plane

News

1. MS#1 (Mechanics: Newton's Laws) : Will be up to this chapter....
2. Office Hours: Come Visit
3. Looking for a few students to join our group. Do you?
   • 喜歡物理,或者 Like Physics and doing things with hands, or,
   • 喜歡計算機編程 Like Computer Programming, or,
   • 關心長老 Interested in Elder Care

Homework Review: Sample Problems

1. Visualize...(picture/graphs)
2. Coord system/unknowns
3. Assumptions
4. Interaction Diagram
5. Free Body Diagrams
6. Solve (⌛)

Pr 7.16 The cable cars in San Francisco are pulled along their tracks by an underground steel cable that moves along at 15km/hr. The cable is driven by large motors at a central power station and extends, via an intricate pulley arrangement, for several miles beneath the city streets. The length of a cable stretches by up to 100 ft during its lifetime. To keep the tension constant, the cable passes around a 1.5 m diameter "tensioning pulley" that rolls back and forth on rails, as shown in the figure. A m = 2000 kg block is attached to the tensioning pulley's cart, via a rope and pulley, and is suspended in a deep hole. What is the tension in the cable car's cable?

New Ideas: None

Knight Chapter 8 Dynamics 2: Motion in Plane PPT Slides