Kinematics and Speed
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Questions and Answers

Which of the following best defines kinematics?

  • The study of forces and their effects
  • The study of energy and its transformations
  • The study of motion and its causes (correct)
  • The study of the properties of matter

    • What is the difference between instantaneous speed and average speed?

  • Instantaneous speed is the speed of an object at an instant, while average speed is the total distance covered by an object in a certain period of time (correct)
  • Instantaneous speed is the total distance covered by an object in a certain period of time, while average speed is the speed of an object at an instant
  • Instantaneous speed and average speed are the same thing
  • Instantaneous speed is the speed of an object at an instant, while average speed is the speed of an object over a long period of time

    • How are speed and velocity different in physics?

  • Speed and velocity both describe how fast an object moves
  • Speed is a scalar quantity, while velocity is a vector quantity (correct)
  • Speed and velocity are the same thing
  • Speed is a vector quantity, while velocity is a scalar quantity

    • What does acceleration measure?

    <p>How fast the velocity changes with respect to time</p> Signup and view all the answers

    In what units is acceleration expressed?

    <p>m/s2</p> Signup and view all the answers

    Which of the following best describes uniformly accelerated motion?

    <p>A body maintaining a constant change in velocity</p> Signup and view all the answers

    What is freefall in physics?

    <p>A situation where the only force acting on an object is gravity</p> Signup and view all the answers

    Which of the following equations can be derived using the basic equations of velocity, average velocity, and acceleration?

    <p>Equation for displacement</p> Signup and view all the answers

    What is the difference between uniform acceleration and uniform motion?

    <p>Uniform acceleration involves a constant change in velocity, while uniform motion involves a constant velocity</p> Signup and view all the answers

    What is the main force acting on an object in freefall?

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

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