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Which of the following statement is true? (a)A scalar is any physical quantity that can be completely specified by its magnitude

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Which of the following statement is true?

(a) A scalar is any physical quantity that can be completely specified by its magnitude

(b) A vector is any positive or negative physical quantity that can be completely specified by its magnitude

(c) A scalar is any physical quantity that requires both a magnitude and a direction for its complete description

(d) A scalar is any physical quantity that can be completely specified by its direction

I had been asked this question at a job interview.

This interesting question is from Addition of a System of Coplanar Forces in division Force Vectors of Engineering Mechanics

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Right choice is (a) A scalar is any physical quantity that can be completely specified by its magnitude

Easy explanation: A scalar is any positive or negative physical quantity that can be completely specified by its magnitude. Examples of scalar quantities include length, mass, time, etc.

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