Physics-
General
Easy
Question
A metal rod of length 
and mass 
is pivoted at one end. A thin disk of mass 
and radius 
is attached at its centre to the free end of the rod. Consider two ways the disc is attached case 
- the disc is not free to rotate about its centre and case 
– the disc is free to rotate about its centre. The rod-disc system performs SHM in vertical plane after being released from the same displaced position. Which of the following statement(s) is/are true?
- Restoring torque in case =Restoring torque in case
- Restoring torque in case <Restoring torque in case
- Angular frequency for case <Angular frequency for case
- Angular frequency for case <Angular frequency for case
=Restoring torque in case
<Restoring torque in case
<Angular frequency for case
<Angular frequency for case
The correct answer is: Angular frequency for case <Angular frequency for case
= Restoring torque about point 
.
In case , moment of inertia will be more. Hence, angular acceleration 
will be less. Therefore angular frequency will be less. Note Question is difficult because this type of SHM is rarely.
Related Questions to study
Physics-
A spring (spring constant =
) is cut into 4 equal parts and two parts are connected in parallel. What is the effective spring constant?
A spring (spring constant =) is cut into 4 equal parts and two parts are connected in parallel. What is the effective spring constant?
Physics-General
Physics-
A simple pendulum is released from shown. If and 
represent the mass of the bob and Length of the pendulum, the gain kinetic energy
at is
A simple pendulum is released from shown. If and represent the mass of the bob and Length of the pendulum, the gain kinetic energy
at is
Physics-General
Physics-
What is the velocity of the bob of a simple pendulum at its mean position, if it is able to rise to vertical height of 10 cm? (g=9.8 
)
What is the velocity of the bob of a simple pendulum at its mean position, if it is able to rise to vertical height of 10 cm? (g=9.8 )
Physics-General
Physics-
How does time period of a pendulum very with length?
How does time period of a pendulum very with length?
Physics-General
Physics-
A particle executing simple harmonic motion of amplitude 5 cm has maximum speed of 
. The frequency of its oscillation is
A particle executing simple harmonic motion of amplitude 5 cm has maximum speed of . The frequency of its oscillation is
Physics-General
Physics-
The periodic time of a particle doing simple harmonic motion is 4 s. The taken by it to go from its mean position to half the maximum displacement (amplitude)
The periodic time of a particle doing simple harmonic motion is 4 s. The taken by it to go from its mean position to half the maximum displacement (amplitude)
Physics-General
Chemistry-
An electrovalent compound is made up of :
An electrovalent compound is made up of :
Chemistry-General
Chemistry-
What are X, Y and Z?
What are X, Y and Z?
Chemistry-General
Chemistry-
Identify the sequence and components of curde oil after fractional distillation of petroleum
Identify the sequence and components of curde oil after fractional distillation of petroleum
Chemistry-General
Chemistry-
The residue left behind after the dry distillation of coal :
The residue left behind after the dry distillation of coal :
Chemistry-General
Chemistry-
When steam is passed over red hot coke, the product obtained is
When steam is passed over red hot coke, the product obtained is
Chemistry-General
Chemistry-
Crude oil is a complex mixture of :
Crude oil is a complex mixture of :
Chemistry-General
Chemistry-
Which among the following is carbonate ore?
Which among the following is carbonate ore?
Chemistry-General
Chemistry-
Which of the following will take place in the given figure?
Which of the following will take place in the given figure?
Chemistry-General
Chemistry-
What happens when dilute sulphuric acid is poured on a copper plate?
What happens when dilute sulphuric acid is poured on a copper plate?
Chemistry-General
