Brittany sits on the outer rim of a merry-go-round, and Lu-Wei sits midway between the center and the rim. The merry-go-round makes one complete revolution every 3 seconds. Lu-Wei's linear velocity is: a. half of Brittany's. b. four times Brittany's. c. twice Brittany's. d. the same as Brittany's. e. one-quarter of Brittany's.
Angular speed, acceleration and displacement
Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.
Angular Position
Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.
Brittany sits on the outer rim of a merry-go-round, and Lu-Wei sits midway between the center and the rim. The merry-go-round makes one complete revolution every 3 seconds. Lu-Wei's linear velocity is:
| a. |
half of Brittany's. |
|
| b. |
four times Brittany's. |
|
| c. |
twice Brittany's. |
|
| d. |
the same as Brittany's. |
|
| e. |
one-quarter of Brittany's. |
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