﻿ Wind is blowing west to east along two parallel tracks. Two trains moving with the same speed in opposite directions have the same steam tracks, if one is double than the other, what is the speed of each train?  from Physics Motion in A Plane Class 11 Manipur Board

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Motion in A Plane

Physics Part I

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Wind is blowing west to east along two parallel tracks. Two trains moving with the same speed in opposite directions have the same steam tracks, if one is double than the other, what is the speed of each train?

Let v and w be the velocity of each train and wind respectively.

According to the question, we have

(v+w) = 2 (v-w)

That is, velocity of each train is 3 times the velocity of wind.

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What is a vector quantity?

A physical quantity that requires direction along with magnitude, for its complete specification is called a vector quantity.
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What is a scalar quantity?

A physical quantity that requires only magnitude for its complete specification is called a scalar quantity.
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Give three examples of vector quantities.

Force, impulse and momentum.
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What are the basic characteristics that a quantity must possess so that it may be a vector quantity?

A quantity must possess the direction and must follow the vector axioms. Any quantity that follows the vector axioms are classified as vectors.

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Give three examples of scalar quantities.

Mass, temperature and energy
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