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A force is applied on a particle in a li...

A force is applied on a particle in a lift moving upward with an acceleration `alpha`. Can Newton's second law of motion be applied to describe the motion of this particle?

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A lift moving with an acceleration forms a non-inertial frame of reference. Newton.s second law of motion is not applicable in a non-inertial frame of reference directly. In such frames, a pseudo force acts on the particle in addition to the real force applied. Newton.s second law of motion can be applied if the expressions for both the real and the pseudo force are known.
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