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Question
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Solution
The physical quantity is force.
Force is a push or pull that can change or tend to change the state of rest, motion, or shape of a body.
Its gravitational unit is kilogram-force (kgf).
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Assertion & Reasoning
- Assertion: The sum of the clockwise moments is equal to the sum of the anticlockwise moments.
- Reason: The principle of conservation of momentum is valid if the external force on the system is zero.
