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Force and Laws of Motion — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceForce and Laws of Motion1 Mark
MCQ
The resultant force acting on a body is zero, then.
  • A
    Body is in unequilibrium.
  • ✓
    Body is in equilibrium.
  • C
    Body moves with constant acceleration.
  • D
    Body moves with retardation.
✓

Answer

Correct option: B.
Body is in equilibrium.
When Various forces act on a body such that its net force is $0,$the body is said to be in dynamic equilibrium. If the forces don't act,static equilibrium is obtained. For example, a plane flying in sky is in dynamic equilibrium.

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