Questions: 1. Which of the following is not a unit of velocity? A. kg / s B. km / s C. m / h D. m / s

1. Which of the following is not a unit of velocity? A. kg / s B. km / s C. m / h D. m / s
Transcript text: (26) Section 2 Assignment: The Nature of Speed For questions 1 to 4, read each question carefully. Decide which of the choices BEST answers the question. Place your answer in the blank space given. (1) $\qquad$ 1. Which of the following is not a unit of velocity? A. $\mathrm{kg} / \mathrm{s}$ B. $\mathrm{km} / \mathrm{s}$ C. $\mathrm{m} / \mathrm{h}$ D. $\mathrm{m} / \mathrm{s}$
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Solution

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Solution Steps

Step 1: Understand the Concept of Velocity

Velocity is a vector quantity that refers to the rate at which an object changes its position. It is expressed in terms of distance per unit time. Common units of velocity include meters per second (m/s), kilometers per hour (km/h), and miles per hour (mph).

Step 2: Analyze Each Option

  • Option A: $\mathrm{kg} / \mathrm{s}$
    This unit represents mass flow rate, not velocity. It measures the amount of mass passing through a point per unit time.

  • Option B: $\mathrm{km} / \mathrm{s}$
    This is a valid unit of velocity, representing kilometers traveled per second.

  • Option C: $\mathrm{m} / \mathrm{h}$
    This is a valid unit of velocity, representing meters traveled per hour.

  • Option D: $\mathrm{m} / \mathrm{s}$
    This is a standard unit of velocity, representing meters traveled per second.

Step 3: Identify the Unit That Is Not a Velocity Unit

From the analysis, it is clear that option A ($\mathrm{kg} / \mathrm{s}$) is not a unit of velocity, as it measures mass flow rate instead.

Final Answer

\(\boxed{\text{A}}\)

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