Physics Speed, Velocity & Acceleration Review
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Questions and Answers

What is speed?

  • The rate of change in velocity
  • The speed AND direction of a moving body
  • Distance and direction of an object's change in position
  • The rate of motion (correct)

    • What is velocity?

  • The instrument for measuring speed
  • The speed AND direction of a moving body (correct)
  • The rate of motion
  • An object's change in position

    • What is acceleration?

  • An object's change in position
  • How far an object moves
  • The rate of motion
  • The rate of change in velocity (correct)

    • The formula for speed is ____.

    <p>distance/time</p> Signup and view all the answers

    The formula for acceleration is ____.

    <p>(change in velocity)/time</p> Signup and view all the answers

    What is the SI (metric) unit for speed?

    <p>Meters per second</p> Signup and view all the answers

    What is the SI (metric) unit for acceleration?

    <p>Meters per second squared</p> Signup and view all the answers

    An acceleration that is positive means you are speeding up.

    <p>True</p> Signup and view all the answers

    An acceleration that is negative means you are speeding up.

    <p>False</p> Signup and view all the answers

    An acceleration that is zero means your speed is not changing.

    <p>True</p> Signup and view all the answers

    What instrument measures the speed in a car?

    <p>speedometer</p> Signup and view all the answers

    What is instantaneous speed?

    <p>The rate at which an object is moving at a given moment in time</p> Signup and view all the answers

    If a car is turning left at a constant speed, it is not accelerating.

    <p>False</p> Signup and view all the answers

    If a car is moving forward at a constant speed, it is accelerating.

    <p>False</p> Signup and view all the answers

    What is faster - the speed of sound or the speed of light?

    <p>Speed of light</p> Signup and view all the answers

    What is motion?

    <p>An object's change in position relative to a reference point.</p> Signup and view all the answers

    What is a reference point?

    <p>A place or object used for comparison to determine if an object is in motion.</p> Signup and view all the answers

    What does distance refer to?

    <p>How far an object moves.</p> Signup and view all the answers

    What is displacement?

    <p>Distance and direction of an object's change in position from the starting point.</p> Signup and view all the answers

    Study Notes

    Speed, Velocity & Acceleration

    • Speed: Rate of motion quantifying how quickly an object changes position.
    • Velocity: Combines speed with direction, indicating the object's rate of motion towards a specific point.
    • Acceleration: Measures how quickly velocity changes; includes both changes in speed and direction.

    Mathematical Formulas

    • Speed Formula: Calculated as distance divided by time (distance/time).
    • Acceleration Formula: Change in velocity over time ((change in velocity)/time).

    Units of Measurement

    • Speed Unit: The International System (SI) unit for speed is meters per second (m/s).
    • Acceleration Unit: The SI unit for acceleration is meters per second squared (m/s²).

    Types of Acceleration

    • Positive Acceleration: Indicates an increase in speed; the object is speeding up.
    • Negative Acceleration: Signifies a decrease in speed; the object is slowing down.
    • Zero Acceleration: Reflects constant speed; no change in speed or direction.

    Instruments and Concepts

    • Speedometer: Device used to measure the speed of a vehicle.
    • Instantaneous Speed: Speed of an object at a specific moment in time.
    • Motion: Describes an object's change in position relative to a reference point.
    • Reference Point: A location or object utilized to compare and determine if another object is in motion.

    Key Comparisons

    • Distance vs. Displacement:
      • Distance: Total movement regardless of direction.
      • Displacement: Straight line measurement from starting position, including direction.

    Questions to Consider

    • Is a car turning left at a constant speed accelerating? Yes, because it is changing direction.
    • Is a car moving forward at a constant speed accelerating? No, as there is no change in speed or direction.
    • What is faster, the speed of sound or the speed of light? The speed of light is faster than the speed of sound.

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    Description

    Test your understanding of the key concepts in speed, velocity, and acceleration with this review flashcard quiz. Ideal for revising fundamental physics terms and formulas, each flashcard provides a clear definition to reinforce your knowledge.

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