List of top Physics Questions on Rotational motion asked in NEET (UG)

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

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 to about their own symmetry axes. The amounts of work $(W)$ required to bring them to rest, would satisfy the relation

A 5000 kg rocket is set for vertical firing. The exhaust speed is 800 m/s. To give an initial upward acceleration of 20$m/s^{2},$ the amount of gas ejected per second to supply the needed thrust will be (Take g = 10 $m/s^{2}$)

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 coinciding the axis of rotation. The expression for loss of energy during this process is:-

Two discs are rotating about their axes, normal to the discs and passing through the centres of the discs. Disc $D_1 $ has 2 kg mass and 0.2 m radius and initial angular velocity of $ 50\, rad \,s^{-1}.$ Disc $ D_2 $ has 4 kg mass, 0.1 m radius and initial angular velocity of $ 200\, rad\, s^{-1} $. The two discs are brought in contact face to face, with their axes of rotation coincident. The final angular velocity (in rad $ s^{-1}$ ) of the system is