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Centre Of Mass ( short notes ) - NEET
In physics, the center of mass of a distribution of mass in space is the unique point where the weighted relative position of the distributed mass sums to zero. This is the point to which a force may be applied to cause a linear acceleration without an angular acceleration. Calculations in mechanics are often simplified when formulated with respect to the center of mass. It is a hypothetical point where entire mass of an object may be assumed to be concentrated to visualise its motion. In other words, the center of mass is the particle equivalent of a given object for application of Newton's laws of motion.
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FAQs on Centre Of Mass ( short notes ) - NEET

1. What is the definition of the centre of mass?
Ans. The centre of mass is the average position of the mass of an object or system of objects. It is the point at which the total mass of the system can be considered to be concentrated.
2. How is the centre of mass determined for an irregularly shaped object?
Ans. To determine the centre of mass for an irregularly shaped object, one can use the method of balance or by suspending the object from different points and observing the equilibrium position. The centre of mass is where the object will balance perfectly.
3. How does the centre of mass affect the stability of an object?
Ans. The lower the centre of mass of an object, the more stable it is. This is because a lower centre of mass provides a wider base for the object, making it harder to topple over. Conversely, a higher centre of mass makes an object more prone to tipping.
4. Can the centre of mass be located outside the physical boundaries of an object?
Ans. Yes, the centre of mass can be located outside the physical boundaries of an object. This occurs when the object has an irregular shape or when the mass distribution is uneven. In such cases, the centre of mass may be closer to the denser part of the object, resulting in its location being outside the object.
5. How does the centre of mass relate to rotational motion?
Ans. The centre of mass is a key concept in rotational motion. When an object rotates, it does so around its centre of mass. The motion of the object can be described in terms of the rotation of the centre of mass. This allows for the calculation of rotational forces and moments of inertia.
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