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Force and Laws of Motion — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceForce and Laws of Motion1 Mark
MCQ
A book remains at rest on a table. It is so because of:
  • A
    No force acts on it
  • B
    Friction between the book and the surface of table
  • ✓
    Force exerted by book on the table, is same as the force exerted by the table on the book
  • D
    All of the above
✓

Answer

Correct option: C.
Force exerted by book on the table, is same as the force exerted by the table on the book
According to Newton's third law, the table exerts the same force on the book as the force that the book applies on the table.
Thus net force acting on the book is zero and hence the book remains at rest on the table.

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