so the monster passige may be confusing so just do auto books
The AREA of the shaded region is the moving object's displacement.
Answer:
C
Explanation:
the formula is a + b = ab
The equivalent of the Newton's second law for rotational motions is:

where

is the net torque acting on the object

is its moment of inertia

is the angular acceleration of the object.
Re-arranging the formula, we get

and since we know the net torque acting on the (vase+potter's wheel) system,

, and its angular acceleration,

, we can calculate the moment of inertia of the system: