Mark the wrong statement ?
Correct answer: D. Newtons laws of motion are valid in an accelerated (non inertial) frame of reference
- A. a frame of reference which is either at rest or moves with a constant velocity is called an inertial frame of reference
- B. an un-accelerated frame of reference is called an inertial frame of reference
- C. all the frames of reference in uniform rectilinear motion are equivalent
- D. Newtons laws of motion are valid in an accelerated (non inertial) frame of reference
Explanation
An inertial frame is unaccelerated, so it is either at rest or moving with constant velocity, and all uniformly moving frames are equivalent for Newtonian mechanics. Newton's laws do not apply directly in an accelerated frame unless fictitious forces are introduced. Students may choose b, but b is only a correct restatement of the definition, not the wrong statement.
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About Newton's Laws of Motion
Newton’s laws explain inertia, the relation between net force and acceleration, and action-reaction pairs. Questions involve free-body diagrams, balanced and unbalanced forces, F = ma, force as the rate of change of momentum, and identifying genuine third-law pairs, which act on different bodies.
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