The document discusses circular motion and angular velocity. It defines a circle with center O and radius r units, and a point P on the circle. The linear velocity v of point P is tangential to the circle at every position on its path. The velocity v is equal to the arc length AP divided by the time period for one revolution. As an example, it states that a satellite moves in a circular orbit completing 20 revolutions per day.

1. Circular Motion

2. Circular Motion Angular Velocity

3. Circular Motion Angular Velocity O r Let O be the centre of a circle, radius r units.

4. Circular Motion Angular Velocity O r Let O be the centre of a circle, radius r units. A P

5. Circular Motion Angular Velocity O r Let O be the centre of a circle, radius r units. A P

6. Circular Motion Angular Velocity O r Let O be the centre of a circle, radius r units. A P

7. Circular Motion Angular Velocity Linear Velocity (Tangential Velocity) O r Let O be the centre of a circle, radius r units. A P

8. Circular Motion Angular Velocity Linear Velocity (Tangential Velocity) O r Let O be the centre of a circle, radius r units. A P The linear velocity, v , of the point at every position on its path is tangential to the circle.

9. Circular Motion Angular Velocity Linear Velocity (Tangential Velocity) O r Let O be the centre of a circle, radius r units. A P The linear velocity, v , of the point at every position on its path is tangential to the circle. v

10. Circular Motion Angular Velocity Linear Velocity (Tangential Velocity) O r Let O be the centre of a circle, radius r units. A P The linear velocity, v , of the point at every position on its path is tangential to the circle. Let arc AP = x v

14. Period

15. Period (time taken for one revolution)

16. Period (time taken for one revolution) e.g. A satellite moves in a circular orbit of 20 rev/day

17. Period (time taken for one revolution) e.g. A satellite moves in a circular orbit of 20 rev/day

18. Period (time taken for one revolution) e.g. A satellite moves in a circular orbit of 20 rev/day

22. Exercise 9A; odd