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5 March, 01:06

Which description includes a vector quantity?

A The car is moving at 70 miles/hr.

B The car's velocity changes at 9.8 m/s2.

C The plane is flying at 850 miles/hr.

D The box moved left 20 meters.

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  1. 5 March, 01:51
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    Answer: D The box moved left 20 meters.

    Explanation:

    Let's start by explaining that a vector is one that has a numerical value along with its units (called a module) and a direction, while a scalar is only determined with a number and its corresponding units, without direction.

    Then, if we are given a quantity with only a numerical value along with its units we will have a scalar, and when we have a quantity with its numerical value along with its units and also the direction is given, we will have a vector.

    So, according to this explanation, the only option that fullfils the conditions of a vector is D:

    The box moved left 20 meters.

    Because we have a numerical value (20) with ist units (meters) and its direction (to the left).
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