Final answer:
Without the precise details from the graph or the initial velocity, we cannot provide a numeric estimate of the ball's speed after 1 second. We can qualitatively describe that the ball's speed would decrease by 9.81 m/s after 1 second due to gravity if the initial velocity is known.
Step-by-step explanation:
To estimate the speed of the ball in m/s after 1 second, we would typically use the kinematic equations of motion. However, since the question mentions a graph that shows the height of the ball above the ground, the exact graph details would be necessary to provide a precise numeric answer. In the absence of the graph, we can use the standard equation for velocity in a uniform acceleration scenario (assuming acceleration due to gravity g = 9.81 m/s2) which is final velocity (v) = initial velocity (u) + acceleration (a) * time (t). Given that the ball is thrown upwards, we can assume a negative acceleration (downwards). However, without knowing the initial velocity with which the ball is thrown, only a qualitative description can be offered. If the initial velocity was known, and assuming no other forces are acting on the ball (like air resistance), we could calculate the speed after 1 second by subtracting 9.81 m/s (the acceleration due to gravity for every second of flight) from the initial upward speed.