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Time

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College Physics I – Introduction

Definition

Time is a fundamental quantity used to measure the duration of events and the intervals between them. It is usually measured in seconds (s) in the International System of Units (SI).

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5 Must Know Facts For Your Next Test

  1. Time is a scalar quantity, meaning it has magnitude but no direction.
  2. In kinematics, time is often denoted by the variable $t$.
  3. The relationship between time and velocity can be described by the equation $v = \frac{d}{t}$, where $v$ is velocity, $d$ is distance, and $t$ is time.
  4. When graphing motion, time typically appears on the horizontal axis (x-axis).
  5. Uniform motion implies constant velocity over equal time intervals.

Review Questions

  • What type of quantity is time: scalar or vector?
  • In the equation $v = \frac{d}{t}$, what does each variable represent?
  • How does uniform motion relate to time and velocity?
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