Suggest a suitable phusical situation for each of the following graph . Fig. 2 (NCT) .7.

Explanation

In fig. 2 (NCT) . 7 (a) , the ` x-t` graph shown initially 9x) is zero i.e. at rest, then it increases with time, attains a constant velue and again reduces to zero with time, then it increases in opposite derection till it again attains a constant velue i.e. comes to rest. The similar physical situation arises when a ball resting on a smooth floor is kicked which rebounds from a wall with redced speed. It then moves to the opposite wall which stops it.
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In Fig. 2 (NCT). 7 (c) , initially the body moves with unifrom velocity. Its acceleration increase for a short duration and then falls to zero and there after body moves with a caonstant veocity .The similar phusical situation arises when a cricket ball moving with a uniform speed is hit with a bat for a very short interval of time.