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In which of the following examples of motion, can the body be considered approximately a point object: a. A railway carriage moving without jerks between two stations b. A monkey sitting on top of a man cycling smoothly on a circular track c. A spinning cricket ball that turns sharply on hitting the ground d. A tumbling beaker that has slipped off the edge of a table.

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(a) and (b) because in both cases size of the moving object is much smaller compared to path length.

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Deependra Verma

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