A thin circular ring of mass M and radius R is rotating about it axis with a constant angular velocity \[\omega .\] Two objects each of mass m are attached gently to the opposite ends of a diameter of the ring. The wheel now rotates with an angular velocity of:

\[100\,\,\text{N/m}{{\text{m}}^{\text{2}}}\]

A thin circular ring of mass M and radius R is rotating about it axis

1.	A thin circular ring of mass M and radius R is rotating about it axis with a constant angular velocity \[\omega .\] Two objects each of mass m are attached gently to the opposite ends of a diameter of the ring. The wheel now rotates with an angular velocity of:
A.	\[\frac{\omega M}{M+m}\]
B.	\[\frac{\omega (M+2M)}{M}\]
C.	\[100\,\,\text{N/m}{{\text{m}}^{\text{2}}}\]
D.	\[\frac{\omega M}{M+2m}\]
Answer» B. \[\frac{\omega (M+2M)}{M}\]

Discussion

No Comment Found

Related MCQs

If Break-even point = Total fixed cost \[\left( 1-\frac{Variable\text{ }cost\text{ }per\text{ }unit}{X} \right),\]Then X is the:
A short column of external diameter D and internal diameter d carries an eccentric load d. The greatest eccentricity which the load can have without producing tension on the cross-section of the column would be
A solid circular shaft is subjected to pure torsion. The ratio of maximum shear stress to maximum normal stress at any point would be
The state of plane stress in a plate of 100 mm thickness is given as \[{{\sigma }_{x\,x}}=100\,\,\text{N/m}{{\text{m}}^{\text{2}}},\] \[{{\sigma }_{x\,y}}=200\,\,\text{N/m}{{\text{m}}^{\text{2}}},\] Young's modulus \[=300\,\,\text{N/m}{{\text{m}}^{\text{2}}}\] Poission?s ratio = 0.3 The stress developed in the direction of thickness is
The degree of reaction of a turbine is defined as the ratio of:
Circumferential stress in a cylindrical steel boiler shell under internal pressure is 80 MPa, Young's modulus of elasticity and Poisson's ratio are respectively \[2\,\,\times \,\,{{10}^{5}}\] MPa and 0.28. The magnitude of circumferential strain in the boiler shell will be:
Consider the following 1. Safety valve. 2. Steam trap 3. Steam separator 4. Economiser. Among these the boiler accessories would" include:
Two hollow shafts of the same material have the same length and outside diameter. Shaft 1 has internal diameter equal to one-third of the outer diameter and shaft 2 has internal diameter equal to half of the outer diameter. If both the shafts are subject to the same torque, the ratio of their twists \[{{\theta }_{1}}/{{\theta }_{2}}\] will be equal to:
In a Parson's turbine stage, blade velocity is 320 m/s at the mean radius and the rotor blade exit angle is 30". For minimum kinetic energy of the steam leaving the stage, the steam velocity at the exit of the stator will be:
For a free vortex design of blade in the rotor of a reaction axial turbine, the specific work along the blade height is:

A thin circular ring of mass M and radius R is rotating about it axis with a constant angular velocity \[\omega .\] Two objects each of mass m are attached gently to the opposite ends of a diameter of the ring. The wheel now rotates with an angular velocity of:

Discussion

No Comment Found

Related MCQs

Reply to Comment