AIPMT 2005 | Rotational Motion Question 68 | Physics

AIPMT 2005

MCQ (Single Correct Answer)

-1

A drum of radius R and mass M, rolls down without slipping along an inclined plane of angle $$\theta $$. The frictional force

dissipates energy as heat

decreases the rotational motion

decreases the rotational and translation motion

converts translational energy to rotational energy.

AIPMT 2004

MCQ (Single Correct Answer)

-1

The ratio of the radii of gyration of a circular disc about a tangential axis in the plane of the disc and of a circular ring of the same radius about a tangential axes in the plane of the ring is

2 : 3

2 : 1

$$\sqrt 5 :\sqrt 6 $$

$$1:\sqrt 2 $$

AIPMT 2004

MCQ (Single Correct Answer)

-1

A round disc of moment of inertia $$I$$₂ about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia $$I$$₁ rotating with an angular velocity $$\omega $$ about the same axis. The final angular velocity of the combination of discs is

$${{{I_2}\omega } \over {{I_1} + {I_2}}}$$

$$\omega $$

$${{{I_1}\omega } \over {{I_1} + I{}_2}}$$

$${{\left( {{I_1} + {I_2}} \right)\omega } \over {{I_1}}}$$

AIPMT 2004

MCQ (Single Correct Answer)

-1

A wheel having moment of inertia 2 kg m² about its vertical axis, rotates at the rate of 60 rpm about this axis. The torque which can stop the wheel's rotation in one minute would be

$${{2\pi } \over {15}}$$ N m

$${\pi \over {12}}$$ N m

$${\pi \over {15}}$$ N m

$${\pi \over {18}}$$ N m

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