AIPMT 2004 | Rotational Motion Question 70 | Physics

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

AIPMT 2004

MCQ (Single Correct Answer)

-1

Three particles, each of mass m gram, are situated at the vertices of an equilateral triangle ABC of side $$l$$ cm (as shown in the figure). The moment of inertia of the system about a line AX perpendicular to AB and in the plane of ABC, in gram-cm² units will be

AIPMT 2004 Physics - Rotational Motion Question 35 English

AIPMT 2004 Physics - Rotational Motion Question 35 English

$${3 \over 4}$$m$$l$$²

2m$$l$$²

$${5 \over 4}$$m$$l$$²

$${3 \over 2}$$m$$l$$²

AIPMT 2003

MCQ (Single Correct Answer)

-1

A thin circular ring of mass M and radius r is rotating about its axis with a constant angular velocity $$\omega $$. Four objects each of mass m, are kept gently to the opposite ends of two perpendicular diameters of the ring. The angular velocity of the ring will be :

$${{M\omega } \over {4m}}$$

$${{M\omega } \over {M + 4m}}$$

$${{\left( {M + 4m} \right)\omega } \over M}$$

$${{\left( {M - 4m} \right)\omega } \over {M + 4m}}$$

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