﻿ The position of a particle is given by,where t is in seconds and the coefficients have the proper units for r to be in metres.(b) What is the magnitude and direction of velocity of the particle at t = 2.0 s ?  from Physics Motion in A Plane Class 11 Manipur Board

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The position of a particle is given by,

where t is in seconds and the coefficients have the proper units for r to be in metres.
(b) What is the magnitude and direction of velocity of the particle at t = 2.0 s ?

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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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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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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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Give three examples of vector quantities.

Force, impulse and momentum.
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Give three examples of scalar quantities.

Mass, temperature and energy
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