Question

Q.14 . Explain : (i) Point mass object.
(ii) Frame of reference.
(iii) 1- D, 2- D and 3- D motion.

Answer 1

Point mass object, Frame of reference and 1D 2D and 3D motion.
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Point mass object.
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The particles does not having any dimensions, and mass is concentrated.

when the two objects are such that the distance between them is too largeas compared to that of size of the particle or size of the mass. This particle is considered to be point mass object .

Frame of reference
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A system of geometric axis in relation to which measure of size position or motion can be explained are made it is called frame of reference.

1D
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The motion in which only one out of the three Axes are used is called 1D motion.

2D
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The motion in which two out of the three Axes are used his car 2D motion.

3D
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The motion in which 3 out of 3 dimensions or Axes are used is called 3D motion.

Answer 2

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