A particle is found to be at rest when seen from a frame S1 and moving with a constant velocity when seen from another frame S2.
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A particle is found to be at rest when seen from a frame S1 and moving with a constant velocity when seen from another frame S2. Mark out the possible options.
(a) Both the frames are inertial
(b) Both the frames are non-inertial
(c) S1 is inertial and S2 is non-inertial
(d) S1 is non-inertial and S2 is inertial
ANSWER:
(a) is possible. Suppose in one inertial frame the particle is at rest. If viewed from another frame which is moving with a constant velocity the same particle will be seen as moving with a constant velocity. but this frame is also inertial.
(b) is also possible. Suppose a non-inertial frame and the particle both are moving with same acceleration in the same direction. From this frame the particle will be seen at rest. If this particle is seen from another non-inertial frame moving with the same acceleration in the same direction but with different velocity at that instant, it will seem to be moving with a constant velocity.
(c) and (d) are not true because this condition is not possible if one frame is inertial and another non-inertial.
(a) Both the frames are inertial
(b) Both the frames are non-inertial
(c) S1 is inertial and S2 is non-inertial
(d) S1 is non-inertial and S2 is inertial
ANSWER:
(a) is possible. Suppose in one inertial frame the particle is at rest. If viewed from another frame which is moving with a constant velocity the same particle will be seen as moving with a constant velocity. but this frame is also inertial.
(b) is also possible. Suppose a non-inertial frame and the particle both are moving with same acceleration in the same direction. From this frame the particle will be seen at rest. If this particle is seen from another non-inertial frame moving with the same acceleration in the same direction but with different velocity at that instant, it will seem to be moving with a constant velocity.
(c) and (d) are not true because this condition is not possible if one frame is inertial and another non-inertial.
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