NEET UG PHYSICS MCQ: SYSTEM OF PARTICLES

1 Easy

1 of 1

Application +4 | -1

The radius of gyration of a disc of mass 50 g and radius 2.82 cm, about an axis passing through its centre of gravity and perpendicular to the plane, is

View answer and explanation

Correct option: C

2 cm

Option C (2 cm) is correct because the radius of gyration (k) for a disc is given by

k = \frac{R}{\sqrt{2}}

, where R is the radius of the disc.

More Questions from SYSTEM OF PARTICLES

Practice All Chapter MCQs →

Moment of inertia of a hollow cylinder of mass M and radius r about its own axis is Two particles of mass

{m_1}

and

{m_2}\,({m_1} > {m_2})

attract each other with a force inversely proportional to the square of the distance between them. If the particles are initially held at rest and then released, the centre of mass will The wheel of toy car rotates about axis. It slows down from 400 rps to 200 rps in 2s. Then its angular retardation in

\mathrm{rad}{\mathrm{s}^{ - 2}}

is When a ceiling fan is switched on, it makes 10 rotations in the first 4 s. How many rotations will it make in the next 4 s? (Assuming uniform angular acceleration) A particle of mass

m

is projected with a velocity '

u

' making an angle of

30^{\circ}

with the horizontal. The magnitude of angular momentum of the projectile about the point of projection when the particle is at its maximum height

h

is: The time period of the second’s hand of a watch is