particle

I was reading Mechanics where it was said that,

Particle is a hypothetical mass-point that has no size.

Can you please explain clearly...

6 Answers

11
CARLOS ESPIRIDIÓN ·

as far as I know....we always take the centre of mass as a particle........
now...some time it is consider that the whole mass of the object is situated at a point....and we know a point has no dimension.........

71
Vivek @ Born this Way ·

@carlos. Kindly do make posts only where atleast you are sure 50% of what are you talking about.

@Srikanth.

In many cases or problems of physics, size of the system particles become significant for many effects. So in general case, when we do have to neglect such influences we consider that mass to be a particle i.e., " mass-point that has no size "

11
CARLOS ESPIRIDIÓN ·

I am sure of wat I am writing @ Vivek :P

1
Srikanth Ranya ·

So here, no size means the object which has been considered a particle has a size which is negligible or does it mean without any size??

Which is not possible...!

71
Vivek @ Born this Way ·

It measn size effects are negligible and only mass effects are to be considered... That's why it is hypothetical.

11
CARLOS ESPIRIDIÓN ·

in case of pure translational motion we generally consider external agent acting on the center of mass.....that means it acts at a single point where we think that at that coordinate the whole mass is situated....

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