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Motion in A Plane

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Physics Part I

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

A river d km wide is flowing at rate <pre>uncaught exception: <b>mkdir(): Permission denied (errno: 2) in /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/util/sys/Store.class.php at line #56mkdir(): Permission denied</b><br /><br />in file: /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/util/sys/Store.class.php line 56<br />#0 [internal function]: _hx_error_handler(2, 'mkdir(): Permis...', '/home/config_ad...', 56, Array)
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#6 {main}</pre> A swimmer which can swim with velocity straight v subscript 2 relative to water, dives into the river perpendicular to the direction of flow to cross the river. What is the displacement of swimmer when he reaches opposite side of the river?

Width if the river = d km 

Rate of flow of river = v1 m/s

Rate of flow of swimmer = v2 m/s

Given that, the swimmer is diving in a direction perpendicular to the flow of river, to cross the river. 

Therefore, the displacement of the swimmer when he reaches the opposite side of the river is given by, 

                         straight x equals straight d square root of 1 plus straight v subscript 1 squared over straight v subscript 2 squared end root


What is a vector quantity?

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

Give three examples of scalar quantities.

Mass, temperature and energy

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. 


Give three examples of vector quantities.

Force, impulse and momentum.

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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