A small particle of mass m moving horizontally collides with a vertical hinged rod elastically. Which of the following quantity is not conserved then?

Momentum

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Angular momentum

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energy

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All of these

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Solution

The correct option is A Momentum
In absence of any external force momentum of a system is conserved. Here mass m moving with velocity $v_{o}$ collides with rod and the hinge applies normal force on end of the rod.
So momentum of the system is not conserved during collision.

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A small particle of mass m moving horizontally collides with a vertical hinged rod elastically. Which of the following quantity is not conserved then?

The correct option is A MomentumIn absence of any external force momentum of a system is conserved. Here mass m moving with velocity vo collides with rod and the hinge applies normal force on end of the rod.So momentum of the system is not conserved during collision.

The correct option is A Momentum
In absence of any external force momentum of a system is conserved. Here mass m moving with velocity $v_{o}$ collides with rod and the hinge applies normal force on end of the rod.
So momentum of the system is not conserved during collision.