Rotational MotionMedium
Question
A horizontal platform is rotating with uniform angular velocity around the vertical axis passing through it center. At some instant of time a viscous fluid of mass m is dropped at the centre and is allowed to spread out and finally fall. The angular velocity during this period:
Options
A.decreases continuously
B.decreases initially and increases again
C.remains unaltered
D.increases continuously
Solution
When the fluid spresds out the moment of inertia of the system is increased, if we apply conservation of angular momentum.
Iω = I1ω1
As I increases due to water spreading out, the angular velocity decrease.
When water lavel falls. I decrreases resulting in increased angular velocity
Create a free account to view solution
View Solution FreeMore Rotational Motion Questions
Three point masses, each of m, are placed at the corners of an equilateral triangle of side l. Then the moment of inerti...A nuniform bar of length 6a and mass 8 m lies on a smooth horizontal table. Two points masses m and 2m moving in the sam...A wheel of a bullock cart is rolling on a level road as shown in the figure below. If its linear speed is $v$ in the dir...In the figure shown, the plank is being pulled to the right with a constant speed v. If the cylinder does not slip then...Four point masses (each of mass m) are arranged it the X-Y plane the moment of inertia of this array of masses about Y-a...