NEET 2017 Physics Conservation of Angular Momentum MCQ Question
Two discs of same moment of inertia rotating about their regular axis passing through centre and perpendicular to the plane of disc with angular velocities ω₁ and ω₂. They are brought into contact face to face coinciding the axis of rotation. The expression for loss of energy during this process is:
1/2 I (ω₁ + ω₂)²
1/4 I (ω₁ - ω₂)²
I (ω₁ - ω₂)²
1/8 I (ω₁ + ω₂)²
Correct Answer
Detailed Explanation
The loss of energy is due to the conversion of kinetic energy into heat when the discs come into contact. The expression 1/4 I (ω₁ - ω₂)² represents this energy loss.
Found an issue with this question?
Related Questions
More from Rotational Motion
The angular speed of a flywheel is increased from 600 rpm to 1200 rpm in 10 s. The number of revolutions completed by the flywheel during this time is...
A wheel having moment of inertia 2 kg-m² about its vertical axis, rotates at the rate of 60 rpm about this axis. The torque which can stop the wheel’s...
More from 2017
A semiconductor has an electron concentration of 8×10¹³ per cm³ and a hole concentration of 5×10¹² per cm³. The electron mobility is 25000 cm²V⁻¹s⁻¹ a...
The proper combination of 3 NOT gate and 1 NAND gate is shown. If $A = 0, B = 1, C = 1$ then the output of the combination is,