Moment of inertia is a measure of an object's resistance to changes in its rotational motion, and it is defined as the sum of the products of each particle's mass and the square of its distance from the axis of rotation.
The moment of inertia for an inclined block can be calculated by using the parallel axis theorem, which states that the moment of inertia of an object is equal to the moment of inertia of the object's center of mass plus the product of the object's mass and the square of the distance between the center of mass and the axis of rotation.
Moment of inertia is directly proportional to rotational motion, meaning that the greater the moment of inertia, the more force is required to change the object's rotational motion.
The angle of inclination does not affect the moment of inertia itself, but it can affect the object's center of mass, which in turn affects the calculation of moment of inertia using the parallel axis theorem.
The shape and mass distribution of an object can also affect its moment of inertia. Objects with more mass concentrated further from the axis of rotation have a larger moment of inertia compared to objects with the same mass distributed closer to the axis of rotation.