1. Physical Modeling, Fall 20061 Centripetal (or Radial) Acceleration The change of v can be in magnitude, direction, or both.

2. Physical Modeling, Fall 20062 Uniform Circular Motion

3. Physical Modeling, Fall 20063 Centripetal (or Radial) Acceleration

4. Physical Modeling, Fall 20064 Centripetal (or Radial) Acceleration

5. Physical Modeling, Fall 20065 Centripetal (or Radial) Acceleration

6. Physical Modeling, Fall 20066 FORCES IN CIRCULAR MOTION When an object travels in a circle, it accelerates toward the center of the circle. A force causes the acceleration.

7. Physical Modeling, Fall 20067 CIRCULAR ORBIT

8. Physical Modeling, Fall 20068 ANGULAR MOMENTUM OF A PARTICLE l = r  p l = rp sin  TORQUE  = r  F  = rF sin 

9. Physical Modeling, Fall 20069 ANGULAR MOMENTUM OF A PARTICLE l = r(p sin  ) = rp  l = p(r sin  ) = pr   = r (F sin  ) = rF   = F(r sin  ) = Fr 

10. Physical Modeling, Fall 200610 ANGULAR MOMENTUM OF A PARTICLE

11. Physical Modeling, Fall 200611 TORQUE

12. Physical Modeling, Fall 200612 ANGULAR MOMENTUM

13. Physical Modeling, Fall 200613 ANGULAR MOMENTUM OF A RIGID BODY L = I  I  m i r i ²

14. Physical Modeling, Fall 200614 NEWTON’S SECOND LAW FOR ROTATION