﻿ A river d km wide is flowing at a rate  A swimmer which can swim with velocity  relative to water, dives into the river perpendicular to the direction of flow to cross the river. How far he will go down the river along the river? from Physics Motion in A Plane Class 11 Manipur Board

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A river d km wide is flowing at a rate  A swimmer which can swim with velocity  relative to water, dives into the river perpendicular to the direction of flow to cross the river. How far he will go down the river along the river?

When the swimmer dives perpendicular to river, then time taken by swimmer to cross the river is,

The distance which the swimmer will go down the river along the river is,

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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 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 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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