Physics - Rotation Question with Solution | TestHub

PhysicsRotationAngular momentumEasy2 minPYQ_2020

PhysicsEasysingle choice

Two wheels $A$ and $B$ are mounted on the same axle. Moment of inertia of $A$ is $6 k g m^{2}$ and it is rotating at $600 rpm$ when $B$ is at rest. What is the moment of inertia of $B$ , if their combined speed is $400 rpm$ ?

Options:

Answer:

Solution:

Applying the principle of conservation of angular momentum,

$(I_{1} + I_{2}) ω = I_{1} ω_{1} + I_{2} ω_{2}$

$(6 + I_{2}) \frac{400}{60} \times 2 π = 6 \times \frac{600}{60} \times 2 π + I_{2} \times 0$

Which gives, $I_{2} = 3 k g m^{2}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:RotationSubtopic:Angular momentum

⏱ 2mℹ️ Source: PYQ_2020

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