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Q: Fill the right combination for the given statement 'Mass moment of inertia of a body about an axis is the sum total of product of its _______ and square of _________'.
  • A. Volume; distance from the axis
  • B. Distance from the axis; volume
  • C. distance from the axis; elemental masses
  • D. elemental masses; distance from the axis
Correct Answer: Option D - Mass moment of inertia– It has been established since long that a rigid body is composed of small particles. If the mass of every particle of a body is multiplied by the square of its perpendicular distance from a fixed line, then the sum of these quantities is known as mass moment of inertia of the body. I = Mr² Where, M = Mass of body I = Moment of inertia
D. Mass moment of inertia– It has been established since long that a rigid body is composed of small particles. If the mass of every particle of a body is multiplied by the square of its perpendicular distance from a fixed line, then the sum of these quantities is known as mass moment of inertia of the body. I = Mr² Where, M = Mass of body I = Moment of inertia

Explanations:

Mass moment of inertia– It has been established since long that a rigid body is composed of small particles. If the mass of every particle of a body is multiplied by the square of its perpendicular distance from a fixed line, then the sum of these quantities is known as mass moment of inertia of the body. I = Mr² Where, M = Mass of body I = Moment of inertia