The moment of inertia of a uniform circular disc of radius R and mass M about an axis touching the disc at its diameter and normal to the disc is from Physics Laws of Motion Class 11 Manipur Board
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Physics Part I

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The moment of inertia of a uniform circular disc of radius R and mass M about an axis touching the disc at its diameter and normal to the disc is

  • MR squared
  • 2 over 5 MR squared
  • 3 over 2 MR squared
  • 1 half MR squared

C.

3 over 2 MR squared

The moment of inertia about an axis passing through centre of mass of disc and perpendicular to its plane is
                     straight I subscript CM space equals space 1 half MR squared
where M is the mass of disc and R its radius. According to theorem of parallel axis, MI of circular disc about an axis touching the disc at it diameter and normal to the disc is
                   straight I equals space straight I subscript CM space plus space MR squared
                     equals 1 half MR squared plus space MR squared
equals 3 over 2 MR squared

The moment of inertia about an axis passing through centre of mass of disc and perpendicular to its plane is
                     straight I subscript CM space equals space 1 half MR squared
where M is the mass of disc and R its radius. According to theorem of parallel axis, MI of circular disc about an axis touching the disc at it diameter and normal to the disc is
                   straight I equals space straight I subscript CM space plus space MR squared
                     equals 1 half MR squared plus space MR squared
equals 3 over 2 MR squared

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State Galileo’s law of motion.

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Is Aristotle’s law of motion now correct?

No. Aristotl'e law of motion is false. 
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When the branches of an apple tree are shaken, the apples fall down. Why?

The apple fall from an apple tree when it shaken because of inertia of rest. Apple is in a state of rest and when the tree is suddenly shaken, apples still tends to remain in it's same state of rest whereas branches move. 

So, the apples fall down. 
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What is Aristotle’s law of motion?

Aristotle’s law of motion states that an external force is required to keep the body in motion.
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