Disc about a diameter, a tangent or a parallel axis (parallel and perpendicular axis theorems)
This type of question, asked 8 times: 11 May 2023 S2, 15 May 2023 S2, 10 May 2024 S1, 11 May 2024 S1, 12 May 2024 S1, 16 Apr 2026 S1, 17 Apr 2026 S2, 15 May 2026 S2. All 8 questions below, oldest first.
Try each one first, then open its answer.
Question 1
11 May 2023 S2
47Moment of inertia of a disc about an axis passing through its centre and perpendicular to its plane is 'I'. The ratio of moment of inertia about a parallel axis tangential to its rim to passing through a point midway between the centre and the rim isTap an option to check your answer.
Question 2
15 May 2023 S2
24The radius of gyration of a circular disc of radius and mass rotating about diameter as axis isTap an option to check your answer.
Question 3
10 May 2024 S1
8If 'I' is moment of inertia of a thin circular disc about an axis passing through the tangent of the disc and in the plane of disc. The moment of inertia of the same disc about an axis perpendicular to the plane and passing through its centre isTap an option to check your answer.
Question 4
11 May 2024 S1
13Radius of gyration of a thin uniform circular disc about the axis passing through its centre and perpendicular to its plane is . Radius of gyration of the same disc about a diameter of the disc is . The ratio isTap an option to check your answer.
Question 5
12 May 2024 S1
20is the moment of inertia of a circular disc about an axis passing through its centre and perpendicular to the plane of disc. is its moment of inertia about an axis AB perpendicular to plane and parallel to axis CM at a distance from centre. The ratio of and is . The value of is ( radius of the disc)Tap an option to check your answer.
Question 6
16 Apr 2026 S1
108A Solid sphere has mass M and radius R. Its moment of inertia about a parallel axis passing through a point at a distance R/3 from its centre isTap an option to check your answer.
Question 7
17 Apr 2026 S2
105Radius of gyration of a thin uniform circular disc about the axis passing through its centre and perpendicular to its plane is . Radius of gyration of the same disc about a diamter of the disc is . the ratio isTap an option to check your answer.
Question 8
15 May 2026 S2
108Moment of inertia of a disc of mass and radius about the centre of mass and perpendicular to plane is and moment of inertia of disc at a distance from centre and perpendicular to plane is then isTap an option to check your answer.