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 (B)</p> Signup and view all the answers

In what units is acceleration expressed?

<p>m/s2 (B)</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 (D)</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 (C)</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 (C)</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 (D)</p> Signup and view all the answers

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

<p>Gravity (C)</p> Signup and view all the answers

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