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9th Class Science Force and laws of motion Question Bank 9th CBSE Science Force and laws of motion

  • question_answer
                                     A boy pulls a table along the floor of a room.    (i) Name the forces acting on the table. (ii) Which of these forces perform positive work? (iii) Which of these forces perform negative work?

    Answer:

                                                                                                   (i) Force exerted by boy, weight of table, reaction due to ground, friction against the pull. (ii) Force exerted by the boy performs positive work.                                                     (iii) Frictional force perform negative work.


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