Rotational Motion PYQs - Last 10 Years

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Practice 29 NEET Physics questions from Rotational Motion. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.

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Last 10 Years Rotational Motion Questions

Showing 29 of 29 filtered questions.

1Rotational Motion

A solid sphere $A$ of radius $R$ and mass $M$ is attached at a point to a smaller solid sphere $B$ of radius $r

2Rotational Motion

A thin horizontal disc is rotating about a vertical axis passing through its fixed centre $O$. Its angular momentum is $L_A$ and $L_B$ computed about points $A$ and $B$, respectively, with $O B=2 \times O A$. The value of $\frac{L_A}{L_B}$ ...

3Rotational Motion

A thin wire of length ' $L$ ' and linear mass density ' $m$ ' is bent into a circular ring (in $x-y$ plane) with centre ' $C$ ' as shown in figure. The moment of inertia of the ring about an axis $y y^{\prime}$ will be:

4Rotational Motion

The angular speed of a flywheel is increased from 600 rpm to 1200 rpm in 10 s . The number of revolutions completed by the flywheel during this time is:

5Rotational Motion

A sphere of radius $R$ is cut from a larger solid sphere of radius $2 R$ as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the $Y$-axis is:

6Rotational Motion

A uniform rod of mass 20 kg and length 5 m leans against a smooth vertical wall making an angle of $60^{\circ}$ with it. The other end rests on a rough horizontal floor. The friction force that the floor exerts on the rod is (Take $g=10 \ma...

7Rotational Motion

The Sun rotates around its centre once in 27 days. What will be the period of revolution if the Sun were to expand to twice its present radius without any external influence? Assume the Sun to be a sphere of uniform density.

8Rotational Motion

The radius of gyration of a solid sphere of mass \(5 \mathrm{~kg}\) about \(X Y\) is \(5 \mathrm{~m}\) as shown in figure. The radius of the sphere is \(\frac{5 x}{\sqrt{7}} \mathrm{~m}\), then the value of $x$ is:

9Rotational Motion

A wheel of a bullock cart is rolling on a level road as shown in the figure below. If its linear speed is \(v\) in the direction shown, which one of the following options is correct (\(P\) and \(Q\) are any highest and lowest points on the ...

10Rotational Motion

A bob is whirled in a horizontal plane by means of a string with an initial speed of \(\omega \mathrm{~rpm}\). The tension in the string is \(T\). If speed becomes \(2 \omega\) while keeping the same radius, the tension in the string become...

11Rotational Motion

The moment of inertia of a thin rod about an axis passing through its mid point and perpendicular to the rod is \(2400 \mathrm{~g} \mathrm{~cm}^2\). The length of the \(400 \mathrm{~g}\) rod is nearly:

12Rotational Motion

A constant torque of \(100 \mathrm{~N} \mathrm{~m}\) turns a wheel of moment of inertia \(300 \mathrm{~kg} \mathrm{~m}^2\) about an axis passing through its centre. Starting from rest, its angular velocity after \(3 \mathrm{~s}\) is :-

13Rotational Motion

The angular acceleration of a body, moving along the circumference of a circle, is :

14Rotational Motion

The ratio of radius of gyration of a solid sphere of mass \(M\) and radius \(R\) about its own axis to the radius of gyration of the thin hollow sphere of same mass and radius about its axis is :-

15Rotational Motion

An energy of 484 J is spent in increasing the speed of a flywheel from 60 rpm to 360 rpm. The moment of inertia of the flywheel is :

16Rotational Motion

The ratio of the radius of gyration of a thin uniform disc about an axis passing through its centre and normal to its plane to the radius of gyration of the disc about its diameter is

17Rotational Motion

The angular speed of a fly wheel moving with uniform angular acceleration changes from 1200 rpm to 3120 rpm in 16 seconds. The angular acceleration in rad/s2 is

18Rotational Motion

A uniform rod of length 200 cm and mass 500 g is balanced on a wedge placed at 40 cm mark. A mass of 2 kg is suspended from the rod at 20 cm and another unknown mass 'm' is suspended from the rod at 160 cm mark as shown in the figure. Find ...

19Rotational Motion

From a circular ring of mass 'M' and radius 'R' an arc corresponding to a 90\(^\circ\) sector is removed. The moment of inertia of the remaining part of the ring about an axis passing through the center of the ring and perpendicular to the ...

20Rotational Motion

Find the torque about the origin when a force of 3 \(\hat j\)
N acts on a particle whose position vector is 2 \(\hat k\) m.

21Rotational Motion

Two particles A and B are moving in uniform circular motion in concentric circles of radii rA and rB with speed vA and vB respecitively. Their time period of rotation is the same. The ratio of angular speed of A to that of B will be :

22Rotational Motion

A solid cylinder of mass 2 kg and radius 4 cm is rotating about its axis at the rate of 3 rpm. The torque required to stop after 2\(\pi\) revolutions is :

23Rotational Motion

A disc of radius 2 m and mass 100 kg rolls on a horizontal floor. Its centre of mass has speed of 20 cm/s. How much work is needed to stop it?

24Rotational Motion

A solid sphere is rotating freely about its
symmetry axis in free space. The radius of
the sphere is increased keeping its mass same.
Which of the following physical quantities
would remain constant for the sphere?

25Rotational Motion

The moment of the force, \(\overrightarrow F = 4\widehat i + 5\widehat j - 6\widehat k\) at
(2, 0, –3), about the point (2, –2, –2), is given by

26Rotational Motion

Three objects, A : (a solid sphere), B : (a thin
circular disk) and C : (a circular ring), each
have the same mass M and radius R. They
all spin with the same angular speed \(\omega\) about
their own symmetry axes. The amounts of
work (W) ...

27Rotational Motion

A solid sphere is in rolling motion. In rolling
motion a body possesses translational kinetic
energy (Kt) as well as rotational kinetic energy
(Kr) simultaneously. The ratio Kt
: (Kt + Kr)
for the sphere is

28Rotational Motion

Two discs of same moment of inertia rotating about their regular axis passing through centre and perpendicular to the plane of disc with angular velocities \({\omega _1}\) and \({\omega _2}\). They are brought into contact face to face coi...

29Rotational Motion

A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of 30 N?