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Force and Laws of Motion — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceForce and Laws of Motion1 Mark
MCQ
Mark the correct statement$(s).$
  • A
    When unbalanced forces act on an object at rest, the object will move.
  • B
    Unbalanced forces are necessary to cause a non$-$moving object to start moving.
  • C
    Unbalanced forces produces change in motion $($acceleration$).$
  • ✓
    All
✓

Answer

Correct option: D.
All
Unbalanced forces result in a non$-$zero net external force acting on a body which produces an acceleration of the body in a particular direction and hence the body at rest starts to move in that direction.
Thus unbalanced forces are necessary to cause a non moving object to start moving.

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