what is point mass ? give examples
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If a body covers a very large distance as compared to its size, then to study its motion, its size or dimensions can be neglected. And the object can be regarded as point mass object. Just like, when we look any object from large distance it looks like a point and it is difficult for us to define its parts separately.
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The mass of an object, which is concentrated at a point is called ''point mass''. It has no internal structures like shape and size . Examples : (i) In the event of motion of Earth around the Sun , Earth can be treated as point mass . (ii) When stone is thrown in space, stone is considered as point mass .
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