﻿ In which of the following examples of motion, can the body be considered approximately a point object: (a) a railway carriage moving without jerks between two stations from Physics Motion in Straight Line Class 11 Manipur Board

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Motion in Straight Line

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In which of the following examples of motion, can the body be considered approximately a point object:
(a) a railway carriage moving without jerks between two stations

The size of a carriage is very small as compared to the distance between two stations. Therefore, the carriage can be treated as a point-sized object.
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Is absolute rest or absolute motion possible?

Absolute rest and absolute motion is not possible because there is no point in the universe which is at rest and can be taken as point of reference. The planet Earth is in continuous motion.
1986 Views

What is motion?

When an object changes it's position with time, with respect to it's surroundings, the object is said to be in motion.
657 Views

What is the most essential thing to study the motion of a body?

The most essential thing to study the motion is reference frame. Rest and motion are relative terms. It means that an object in one situation can be in rest but in another situation, the same object will be in motion.
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Can a body be always at rest in some frame?

Yes, a body is always at rest in a frame which is fixed with the body itself.
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What is rest?

When an object does not change its position with time, with respect to it's surroundings. In such a case the object is said to be at rest.
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