2. Questions Bank
  3. 4th Class
  4. Science
  5. Force, Work and Energy

4th Class Science Force, Work and Energy Question Bank Force Work and Energy

  • question_answer
    Geeta stretched a piece of plastic food wrap over a large bowl and held it firmly in place with a rubber band. She put some green beans on the plastic. Then she used a spoon to hit the side of the bowl. She saw that the beans bounced all over the plastic producing little tapping noises. Which of the following shows the energy conversions that have taken place?

    A) \[Movement\to Sound\to Movement\]

    B) \[Sound\to Sound\to Movement\]

    C) \[Movement\to Sound\to Movement\to Sound\]

    D) \[Sound\to Movement\to Sound\to Movement\]

    Correct Answer: C

    Solution :

    Hitting (movement) of the spoon with the side of the bowl produces sound which leads to bouncing (movement) of the beans all over the plastic wrap. This bouncing again produces sound (little tapping noises by beans). Thus, energy conversions would be \[Movement\to Sound\to Movement\to Sound\]


You need to login to perform this action.
You will be redirected in 3 sec spinner