﻿ A particle is moving in a circle of radius r centred at O with constant speed v. Find the magnitude of change in velocity moving from A to B  from Physics Motion in A Plane Class 11 Manipur Board

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A particle is moving in a circle of radius r centred at O with constant speed v. Find the magnitude of change in velocity moving from A to B  Let be the velocities of particle at A and B.

Since the speed of the particle ( ) is constant.

Therefore, As angle therefore angle between the velocity vectors is also Now,    =  This is the required change in magnitude of the velocity on moving from A to B.

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Give three examples of scalar quantities.

Mass, temperature and energy
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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 vector quantities.

Force, impulse and momentum.
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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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