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Accelerate JEE 2020: Rotational Motion Class 4 (17.09.2019)

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Question 1

Seven identical circular planar disks, each of mass M and radius R, are welded symmetrically as shown. The moment of inertia of the arrangement about the axis normal to the plane and passing through the point P is :

Question 2

From a uniform circular disc of radius R and mass 9 M, a small disc of radius

is removed as shown in the figure. The moment of inertia of the remaining disc about an axis perpendicular to the plane of the disc and passing through centre of disc is

Question 3

A thin circular disk is in the xy plane as shown in the figure. The ratio of its moment of inertia about z and z’ axis will be

Question 4

The moment of inertia of a circular disc of radius 2 m and mass 1 kg about an axis passing through the centre of mass but perpendicular to the plane of the disc is 2 kg m². Its moment of inertia about an axis parallel to this axis but passing through the edge of the disc is ........(See the given figure).
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Question 5

A disc of radius `R' and thickness

has moment of inertia 'I' about an axis passing through its centre and perpendicular to its plane. Disc is melted and recast into a solid sphere. The moment of inertia of a sphere about its diameter is

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Sep 17JEE & BITSAT