﻿ Which of the following is true or false? Give examples: (i) A scalar quantity can never take negative values. (ii) It is necessary for a scalar quantity to be dimensionless.  from Physics Motion in A Plane Class 11 Manipur Board

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Class 10 Class 12

Which of the following is true or false? Give examples:
(i) A scalar quantity can never take negative values.
(ii) It is necessary for a scalar quantity to be dimensionless.

(i) False, work is a scalar quantity and can have negative values.

(ii) False, work is a scalar quantity and have dimensions.

The dimensional formula of work is M1 L2 T-2]

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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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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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Give three examples of vector quantities.

Force, impulse and momentum.
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