Physics Theories and Quantities Quiz
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Questions and Answers

Which concept describes why the motion happened and what causes it to happen?

  • Kinematics
  • Scalar dot product
  • Centripetal force
  • Dynamics (correct)
  • If the velocity of a particle is decreasing to the east, what can be said about its acceleration?

  • It is zero
  • It is changing direction
  • It is positive
  • It is negative (correct)
  • What happens to the instantaneous speed in relation to the magnitude of the instantaneous velocity?

  • Instantaneous speed is always equal (correct)
  • Instantaneous speed is always greater
  • Instantaneous speed is always less
  • Instantaneous speed is unpredictable
  • What acceleration component in circular motion is associated with the change in direction?

    <p>Radial acceleration</p> Signup and view all the answers

    In a non-uniform circular motion, what types of acceleration are present?

    <p>Both tangential and radial acceleration</p> Signup and view all the answers

    What dictates the trajectory of a projectile?

    <p>Initial velocity and acceleration</p> Signup and view all the answers

    What is the fundamental difference between a theory and a law in physics?

    <p>Theories can only be strengthened through evidence, while laws are immutable.</p> Signup and view all the answers

    Which of the following is an example of a scalar and fundamental quantity in physics?

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

    Which method involves finding the sum of the i and j components of a vector?

    <p>Analytic method</p> Signup and view all the answers

    What is the relationship between accuracy and position in measurement?

    <p>Accuracy is the closeness of a measured value to a theoretical value, while position is the closeness of all measured values.</p> Signup and view all the answers

    If the direction of a vector is south of east, what is the sign of its i and j components?

    <p>i is positive, j is negative</p> Signup and view all the answers

    What is the relationship between a unit vector and a resultant vector?

    <p>A resultant vector is a single vector whose effect is the same as the individual vectors acting together.</p> Signup and view all the answers

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