Download App

Work And Energy — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceWork And Energy1 Mark
MCQ
When a force retards the motion of a body, the work done is:
  • A
    Zero
  • B
    Negative
  • C
    Positive
  • D
    Positive or negative depending upon the magnitude of force and displacement
✓

Answer

  1. Negative

Explanation:

When the force retards the motion of a body, the work done is negative.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q. [1 M]" from Work And Energy→Work And Energy — all question types→Science STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order:
  1. Rutherford's atomic model.
  2. Thomson's atomic model.
  3. Bohr's atomic model.
    →
    The jelly like substance present in the cell is called as:
    →

    Milk does not provide:

    1. Vitamin A and D.
    2. Carbohydrates, proteins and fats.
    3. Minerals such as phosphorus and calcium.
    4. Iron.
    →
    Cells regulate their activity through:
    →
    Thrust is which type of force:
    →
    Which one is made of dead cells:
    →
    In the Thomson’s model of the atom, which of the following statements are correct?

    1. The mass of the atom is assumed to be uniformly distributed over the atom.
    2. The positive charge is assumed to be uniformly distributed over the atom.
    3. The electrons are uniformly distributed in the positively charged sphere.
    4. The electrons attract each other to stabilize the atom.

    Options:

    →
    The value of g on the surface of moon is:
    →

    AIDS is mainly caused by:

    1. Sexual intercourse.
    2. Blood transfusion.
    3. Through placental transfusion.
    4. All of the above.
    →
    If the tip of the sugarcane plant is removed from the field, even then it keeps on growing in length. It is due to the presence of:
    →