Question

1) Define angular momentum and derive equation for angular momentum of rotating body
2) State and explain law of conservation of angular momentum and give its 2 example

Note : Answer any one ​

Answer 1

Answer:

Statement: The angular momentum of a body remains constant if the resultant external torque acting on the body is zero. Example: ... When she suddenly folds her arms and brings the stretched leg close to the body, her angular velocity increases on account of the decrease in moment of inertia

Explanation:

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Answer 2

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1) Define angular momentum and derive equation for angular momentum of rotating body

ans:-

The angular momentum of the particle is defined as the moment of momentum about the axis of rotation. ∴ Angular momentum = linear momentum x perpendicular distance from the axis. If ω is the angular velocity of the particle, then the linear velocity v = r ω. ∴ Angular momentum of each particle = (mv)r = (mrω) r = mr2ω.

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State and explain law of conservation of angular momentum and give its 2 example

ans:-

The angular momentum of a body remains constant if the resultant external torque acting on the body is zero. Example: ... When she suddenly folds her arms and brings the stretched leg close to the body, her angular velocity increases on account of the decrease in moment of inertia.

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