Which of the following statements are not correct for a particle moving with variable velocity?
(I) Average Speed = Average Velocity
(II) Instantaneous Speed = Magnitude of Instantaneous Velocity
(III) Distance covered = Magnitude of Displacement

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Only (I) and (II)

Only (I) and (III)

Only (II) and (III)

All (I), (II), (III)

answer is D.

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Detailed Solution

For a particle moving with variable velocity, the average speed can never be equal to average velocity. Therefore, statement (I) is incorrect. The particle moving with a variable velocity will undergo non-uniform motion. Since, the magnitude of displacement and distance are different for a particle undergoing non-uniform motion. Hence, the statement (III) is also incorrect.

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