AIPMT 2010 Solved Papers
Q. 7. A circular disk of moment of inertia 
is rotating in a horizontal plane, about its symmetry axis, with a constant angular speed 
. Another disk of moment of inertia 
Ib is dropped coaxially onto the rotating disk. Initially the second disk has zero angular speed. Eventually both the disks rotate with a constant angular speed 
. The energy lost by the initially rotating disk to friction is:
Sol.
Answer : (4)
Q. 8. The displacement of a particle along the x-axis is given by x = a sin2 ωt. The motion of the particle corresponds to:
Sol.
Answer : (1)