12. Rotational Kinematics
Equations of Rotational Motion
12. Rotational Kinematics Equations of Rotational Motion
8PRACTICE PROBLEM
A toy helicopter is placed in the xy plane with the propeller rotating about its central axis that is parallel to the z-axis. At t = 0, the angular velocity of the propeller, ωz = -9.60 rad/s. At t = 12.0 s, the angular velocity has increased steadily to +7.60 rad/s. Taking counterclockwise rotation as positive, determine the time intervals for which the speed is increasing and decreasing.
A toy helicopter is placed in the xy plane with the propeller rotating about its central axis that is parallel to the z-axis. At t = 0, the angular velocity of the propeller, ωz = -9.60 rad/s. At t = 12.0 s, the angular velocity has increased steadily to +7.60 rad/s. Taking counterclockwise rotation as positive, determine the time intervals for which the speed is increasing and decreasing.