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What is meant by point mass and give sui...

What is meant by point mass and give suitable example ?

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A " positn mass" has no internal structure like shape and size . Mathematically it has finite mass with zero dimension .
In the motion of Earth with respect to Sun, Earth is treated as a point mass. This is because the distance between the Sum and Earth is very large compared to the size of the Earth .
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PREMIERS PUBLISHERS-KINEMATICS -Other important questions & answers (II. Very short answer questions).
  1. What is meant by Frame of reference?

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  2. What is meant by right-handed Cartesian coordinate system ?

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  3. What is meant by point mass and give suitable example ?

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  4. Define linear motion. Give example.

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  5. Define uniform circular motion . Give some examples.

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  6. Define rotational motion. Give example.

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  7. Define vibratory motion. Give example

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  8. What do you mean by motion in one, two and three dimensions ?

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  9. What do you mean by motion in one, two and three dimensions ?

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  10. What do you mean by motion in one, two and three dimensions ?

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  11. State in the following cases, whether the motion is one ,two (or) thre...

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  12. State in the following cases, whether the motion is one ,two (or) thre...

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  13. State in the following cases, whether the motion is one ,two (or) thre...

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  14. State in the following cases, whether the motion is one ,two (or) thre...

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  15. Define and illustrate the following terms. Equal vectors.

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  16. What is meant by Collinear vector ? Explain them .

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  17. Define and illustrate the following terms. Parallel vectors,

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  18. Define and illustrate the following terms. Anti-parallel vectors,

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  19. Define unit vector .

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  20. Define Orthogonal unit vectors.

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