A ball is thrown vertically upwards. Which of the following plots represent the speed graph of the ball during its flight if the air resistence is not ignored?

Explanation

When a stone is thrown vertically upwards, its velocity goes on decreasing at a constant rate of `g = 10 m//s^(2)`. At the highest point, velocity `= 0`. From the highest point, the stone falls down and its velocity goes on increasing at a constant rate of `g = 10 m//s^(2)`. The velocity time graph for upward motion is straight `AB` and velocity time graph for downward motion is straight line `BC`.