Work and Energy in Physics Quiz
5 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What type of quantity is work in physics?

  • Vector, having both magnitude and direction.
  • Pseudoscalar, having magnitude and a directional pseudovector.
  • Scalar, having only magnitude and no direction. (correct)
  • Tensor, having multiple components and directions.

    • When a ball is thrown upwards, what is the work done by the gravitational force on the ball?

  • Positive, equal to the weight of the ball multiplied by the distance to the ground.
  • Depends on the mass of the ball.
  • Negative, equal to the weight multiplied by the displacement in the upwards direction. (correct)
  • Zero, as there is no net displacement in the vertical direction.

    • In physics, work is defined as the energy transferred to or from an object via the application of force along a displacement. Which of the following statements about work is true?

  • Work equals the product of the force strength and the distance traveled when the force is constant and aligned with the direction of motion. (correct)
  • Work done by a gravitational force is always negative when an object moves upwards.
  • Work is always positive when a force is applied in the direction of displacement.
  • Work done is given by the sum of force and displacement vectors.

    • The SI unit of work is:

    <p>Joule (J), same as for energy.</p> Signup and view all the answers

    $W = F ullet s ullet \cos(\theta)$ represents:

    <p>The equation for calculating work when force and displacement are constant and aligned at an angle $\theta$ to each other.</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser