A disk rotates at a constant angular velocity of 30 degrees per second. Consider a point on the edge of the disk. Through how many degrees has it rotated after 3 seconds?

The disk covers a rotation of 90º after 3 seconds.

Explanation:

Since the disk rotates at constant angular speed, we can determine the change in angular position (), measured in sexagesimal degrees, by the following kinematic formula:

(1)

Where:

- Angular velocity, measured in sexagesimal degrees per second.

- Time, measured in seconds.

If we know that and , then the change in angular position is:

The disk covers a rotation of 90º after 3 seconds.

1/0.14nm = 10^10/1.4 a lot