In which of the following exmples of motion, can the body be considered approxinmately a point object :
(a) a railway carriage moving without jerks between two two stations.
(b) a mondey sistting on top of a man cycling smoothly on a circulat track. (c ) a spinning cricket ball that turns sharply on hitting the round . (d) a tumbling beake theat has slopped off the edge of a table ?

Explanation

In parts (a),(b) the body can be considered approximately as a point object because the distance covered by the body is very much greater than the size of the body.