In which of the following cases can the object be considered approximately a point object, meaning its size is negligible compared to the distance covered or the path involved?
| 1. | A cricket ball spinning and turning sharply after hitting the ground. |
| 2. | A beaker tumbling off the edge of a table. |
| 3. | A monkey sitting on top of a man cycling smoothly on a circular track. |
| 4. | A railway carriage moving without jerks between two stations. |
(a), (b)
(a) The size of a carriage is very small as compared to the distance between two stations. Therefore, the carriage can be treated as a point sized object.
(b) The size of a monkey is very small as compared to the size of a circular track. Therefore, the monkey can be considered as a point sized object on the track.
(c) The size of a spinning cricket ball is comparable to the distance through which it turns sharply on hitting the ground. Hence, the cricket ball cannot be considered as a point object.
(d) The size of a beaker is comparable to the height of the table from which it slipped. Hence, the beaker cannot be considered as a point object.
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