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Laws of Motion — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsLaws of Motion1 Mark
MCQ
A particle stays at rest as seen in a frame. We can conclude that,
  • A
    The frame is inertial.
  • B
    Resultant force on the particle is zero.
  • C
    The frame may be inertial but resultant force on the particle is zero.
  • D
    The frame may be non-inertial but there is a non zero resultant force.
✓

Answer

  1. The frame may be inertial but resultant force on the particle is zero.
  2. The frame may be non-inertial but there is a non zero resultant force.

Explanation:

Particle will be seen at rest only when frame is inertial and resultant force on particle is zero. Also, if frame is non inertial (i.e., accelerated), the particle must also possess the same acceleration in magnitude and direction i.e., resultant force on the particle must be non zero.

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