1
AIPMT 2004
MCQ (Single Correct Answer)
+4
-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
A
2 : 3
B
2 : 1
C
$$\sqrt 5 :\sqrt 6 $$
D
$$1:\sqrt 2 $$
2
AIPMT 2004
MCQ (Single Correct Answer)
+4
-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
A
$${{{I_2}\omega } \over {{I_1} + {I_2}}}$$
B
$$\omega $$
C
$${{{I_1}\omega } \over {{I_1} + I{}_2}}$$
D
$${{\left( {{I_1} + {I_2}} \right)\omega } \over {{I_1}}}$$
3
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
A ball of mass 2 kg and another of mass 4 kg are dropped together from a 60 feet ball building. After a fall of 30 feet each towards earth, their respective kinetic energies will be in the ratio of
A
$$\sqrt 2 $$ : 1
B
1 : 4
C
1 : 2
D
1 : $$\sqrt 2 $$
4
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
Consider a system of two particles having masses m1 and m2. If the particle of mass m1 is pushed towards the mass centre of particles through a distance d. by what distance would be particle of mass m2 move so as to keep the mass centre of particles at the original position?
A
$${{{m_1}} \over {{m_1} + m{}_2}}$$d
B
$${{{m_1}} \over {{m_2}}}$$d
C
d
D
$${{{m_2}} \over {{m_1}}}$$d