Physics: Speed, Velocity, and Acceleration Definitions

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Questions and Answers

What is the definition of velocity?

  • Measure of distance traveled in a given period of time with a direction. (correct)
  • Measure of distance traveled in a given period of time without direction.
  • An object moving at a constant speed.
  • The rate at which velocity is changing.

What does constant velocity refer to?

  • An object accelerating.
  • The total distance traveled.
  • An object moving at a constant speed and in a constant direction. (correct)
  • An object's speed that is changing direction.

What is instantaneous velocity?

The velocity of an object at a specific instant.

How do you calculate average velocity?

<p>Total distance traveled divided by total time taken.</p> Signup and view all the answers

What does terminal velocity represent?

<p>The top speed an object can reach.</p> Signup and view all the answers

What is the definition of speed?

<p>Measure of the distance traveled in a given period of time.</p> Signup and view all the answers

Define constant speed.

<p>An object moving at a constant speed.</p> Signup and view all the answers

What is instantaneous speed?

<p>The speed of an object at a specific instant.</p> Signup and view all the answers

What is average speed?

<p>Total distance traveled divided by the total time taken.</p> Signup and view all the answers

What is acceleration?

<p>The rate at which velocity is changing.</p> Signup and view all the answers

What is constant acceleration?

<p>A moving object that is not changing speed or direction.</p> Signup and view all the answers

How do you calculate average acceleration?

<p>The change in velocity divided by the change in time.</p> Signup and view all the answers

What is negative acceleration?

<p>When an object is slowing down.</p> Signup and view all the answers

What are vectors?

<p>Quantities represented by an arrow that has both direction and magnitude.</p> Signup and view all the answers

Define magnitude in physics.

<p>The size or length of something.</p> Signup and view all the answers

What are scalars?

<p>Quantities with just magnitude alone.</p> Signup and view all the answers

What is distance in terms of scalars?

<p>Measurement of the actual path covered.</p> Signup and view all the answers

What is displacement?

<p>The straight line distance between two points.</p> Signup and view all the answers

What is the Pythagorean theorem?

<p>c^2 = a^2 + b^2</p> Signup and view all the answers

What is a resultant vector?

<p>The result of vector addition a + b.</p> Signup and view all the answers

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Study Notes

Velocity

  • Defined as the measure of distance traveled over time, including direction.

Constant Velocity

  • Occurs when an object maintains the same speed and direction throughout its motion.

Instantaneous Velocity

  • The specific velocity of an object at a particular moment in time.

Average Velocity

  • Calculated by taking the total distance traveled and dividing it by the total time taken for that distance.

Terminal Velocity

  • The maximum speed achieved by an object as it falls through a fluid, where gravitational force is balanced by drag.

Speed

  • A scalar quantity that indicates how fast an object is moving, measured as distance over time.

Constant Speed

  • Describes motion at unchanging speed, with no variations over the time period considered.

Instantaneous Speed

  • Refers to the speed of an object at a specific moment in time, equivalent to instantaneous velocity when direction is included.

Average Speed

  • Determined by dividing total distance traveled by the total time taken, similar to average velocity but direction is not considered.

Acceleration

  • Represents the rate of change of velocity, encompassing increases or decreases in speed and changes in direction.

Constant Acceleration

  • Characterizes a motion where the object's speed and direction remain unaltered over time.

Average Acceleration

  • Calculated by changing the velocity and dividing it by the time taken for that change.

Negative Acceleration

  • Indicates a slowing down of an object, often referred to as deceleration.

Vectors

  • Quantities that possess both magnitude and direction, represented visually by arrows.

Magnitude

  • The measure of size or length of a physical quantity, often used in conjunction with vectors.

Scalars

  • Quantities that are defined only by their magnitude, lacking any directional component.

Distance (Scalar)

  • Measurement of the actual path traveled by an object, expressed as a scalar quantity.

Displacement (Vector)

  • The shortest straight-line distance between two points, characterized by both distance and direction.

Pythagorean Theorem

  • A fundamental relation in Euclidean geometry, expressed as ( c^2 = a^2 + b^2 ), used for calculating the lengths in right triangles.

Resultant Vector

  • The composite outcome when two or more vectors are added together, resulting in a single vector.

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