Module 8: Moment of Inertia

Question 1

3 factors affecting moment of inertia

Answer 1

1. dimension of the object
2. density with which the particles are packed
3. axis of rotation and distribution of mass

Question 2

depends upon the
second moment of the area

Answer 2

radius of gyration

Question 3

The radius of gyration of a composite area is ___________________
to the sum of the radii of gyration of the component
areas

Answer 3

not equal

Question 4

The radius of gyration of a composite area is not equal
to the ________________________________________ of the component
areas

Answer 4

sum of the radii of gyration

Question 5

is related to the first moment of
the area.

Answer 5

ordinate

Question 6

expresses a body’s tendency to resist
angular acceleration or deceleration

Answer 6

moment of inertia

Question 7

also known as second moment

Answer 7

moment of inertia

Question 8

sum of the products of each area given in
the body with the square of its distance
from the axis of rotation

Answer 8

moment of inertia

Question 9

distance from the center of mass of a body at which the whole mass could be
concentrated without changing its moment of rotational inertia about an axis
through the center of mass

Answer 9

radius of gyration