Both speed and velocity measure how fast something is moving. however, since speed is not a it does not require a(n) . a) quantity, unit b) magnitude, unit c) vector, direction d) scalar, direction

Both speed and velocity measure how fast something is moving. However, since speed is not a vector it does not require a direction.

Option C

Explanation:

Depending upon the direction and magnitude, the quantities are classified as scalar and vector quantities. Scalars are used to denote magnitude whereas vector for both magnitude and direction.

Speed is an example of magnitude, so scalar quantity as it denotes the distance travelled with respect to time whereas velocity is also the same along with the direction of the object. For car, speed is important, when it comes to aircraft and laes, velocity is used.

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root word, prefixes, and suffixes