up increases on the way down
34. An.object with an initial angular velocity of 2 radian/sec rotates with constant angular
acceleration 4 seconds later, its angular velocity is 10 radian/sec calculate its angular
displacement during this time interval
a. 9 radian
b. 12 radian
c. 18 radian
d. 24 radian
e. NOT
25
Starting with zero initial
Answers
Answer:
In the preceding section, we defined the rotational variables of angular displacement, angular velocity, and angular acceleration. In this section, we work with these definitions to derive relationships among these variables and use these relationships to analyze rotational motion for a rigid body about a fixed axis under a constant angular acceleration. This analysis forms the basis for rotational kinematics. If the angular acceleration is constant, the equations of rotational kinematics simplify, similar to the equations of linear kinematics discussed in Motion along a Straight Line and Motion in Two and Three Dimensions. We can then use this simplified set of equations to describe many applications in physics and engineering where the angular acceleration of the system is constant. Rotational kinematics is also a prerequisite to the discussion of rotational dynamics later in this chapter.