MHT CET 2024 4th May Morning Shift | Rotational Motion Question 24 | Physics

A disc and a ring both have same mass and radius. The ratio of moment of inertia of the disc about its diameter to that of a ring about a tangent in its plane is

$1: 2$

$1: 4$

$1: 6$

$1: 8$

MHT CET 2024 4th May Morning Shift

MCQ (Single Correct Answer)

-0

A rotating body has angular momentum ' $L$ '. If its frequency is doubled and kinetic energy is halved, its angular momentum will be

$\mathrm{\frac{L}{4}}$

$\mathrm{\frac{L}{2}}$

$\mathrm{2L}$

$\mathrm{4L}$

MHT CET 2024 4th May Morning Shift

MCQ (Single Correct Answer)

-0

A solid cylinder of mass M and radius R is rotating about its geometrical axis. A solid sphere of the same mass and same radius is also rotating about its diameter with an angular speed half that of the cylinder. The ratio of the kinetic energy of rotation of the sphere to that of the cylinder will be

$1: 4$

$1: 5$

$2: 3$

$3: 2$

MHT CET 2024 3rd May Evening Shift

MCQ (Single Correct Answer)

-0

The earth is assumed to be a sphere of radius ' $R$ ' and mass ' $M$ ' having period of rotation ' $T$ '. The angular momentum of earth about its axis of rotation is

$\frac{2 \pi \mathrm{MR}^2}{5 \mathrm{~T}}$

$\frac{4 \pi \mathrm{MR}^2}{5 \mathrm{~T}}$

$\frac{\mathrm{MR}^2 \mathrm{~T}}{2 \pi}$

$\frac{\mathrm{MR}^2 \mathrm{~T}}{4 \pi}$

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