(a) The x - t graph shows that initially x is equal to zero, then it acquires a constant value becomes zero, then it increases in opposite direction till it again settles to a constant value, i.e., comes to rest. Hence, it may represent a physical situation such as a ball (initially at rest) on being kicked, rebounds from the wall with reduced speed and then moves to the opposite and the stops.
(b) It follows from this graph that velocity changes again and again with the passage of time and every time losing some speed. Hence, it represent a physical situation such as freely falling ball (after being thrown up), on striking the ground rebounds with reduced speed after each that hit against the ground.
(c) The graph show that the body gets accelerated during short duration only. Hence, it represents a physical situation such as a ball moving with a uniform speed is hit with a bat for a very short time -interval.
