Angular speed is the rate at which an object rotates, measured in revolutions per unit time. Linear velocity is the speed at which an object moves in a straight line, measured in units of distance per unit time. The document provides examples to distinguish between the two, such as a carousel rotating at 4 revolutions per minute, where the angular speed is the revolutions and the linear velocity is the speed of the rim as it rotates.

1. Essential Question:
What is the difference between angular speed and
linear velocity?
1

2. 2

3. 3

4. 4

5. 5

6. 6

7. Ex 4) A carousel with a 50­ft. diameter makes 4
revolutions in 1 minute. Find the angular speed
of the carousel and the linear speed of the
platform rim.
7

8. Degrees-Minutes-Seconds
8

9. Ex. 5) How far is it from San Francisco, CA
to Seattle, WA?
San Francisco Latitude: 37°47'36" N
Seattle Latitude: 47°37'18" N
Same Longitude
Earth: Sphere of radius 4000 miles
9

10. Assignment:
4.1B p. 291 #71-105 (odd)
10