1
AIPMT 2008
+4
-1
A thin rod of length L and mass M is bent at its midpoint into two halves so that the angle between them is 90o. The moment of inertia of the bent rod about an axis passing through the bending point and perpendicular to the plane defined by the two halves of the rod is
A
$${{M{L^2}} \over 6}$$
B
$${{\sqrt 2 M{L^2}} \over {24}}$$
C
$${{M{L^2}} \over {24}}$$
D
$${{M{L^2}} \over {12}}$$
2
AIPMT 2008
+4
-1
The ratio of the radii of gyration of a circular disc to that of a circular ring, each of same mass and radius, around their respective axes is
A
$$\sqrt 2 :1$$
B
$$\sqrt 2 :\sqrt 3$$
C
$$\sqrt 3 :\sqrt 2$$
D
$$1:\sqrt 2$$
3
AIPMT 2007
+4
-1
A particle of mass m moves in the XY plane with a velocity v along the straight line AB. If the angular momentum of the particle with respect to origin O is LA when it is at A and LB when it is at B, then
A
LA = LB
B
the relationship between LA and LB depends upon the slope of the line AB
C
LA < LB
D
LA > LB.
4
AIPMT 2007
+4
-1
A uniform rod AB of length $$l$$ and mass m is free to rotate about point A. The rod is released from rest in the horizontal position. Given that the moment of inertia of the rod about A is ml2/3, the initial angular acceleration of the rod will be

A
$${{mgl} \over 2}$$
B
$${3 \over 2}gl$$
C
$${{3g} \over {2l}}$$
D
$${{2g} \over {3l}}$$
EXAM MAP
Medical
NEET