To find the average acceleration of the ball, we can use the following formula:
Average acceleration (a) = (Final velocity (v) - Initial velocity (u)) / Time taken (t)
In this case, the ball is dropped, so its initial velocity (u) is 0 m/s. The final velocity (v) can be calculated using the equation of motion:
v = u + at
Since the ball is dropped, it accelerates only due to gravity, which is approximately 9.8 m/s². The time taken (t) is given as 2 seconds. We can substitute these values into the equation to find the final velocity:
v = 0 + (9.8 m/s²) * (2 s) v = 0 + 19.6 m/s v = 19.6 m/s
Now we can calculate the average acceleration using the formula:
a = (v - u) / t a = (19.6 m/s - 0 m/s) / 2 s a = 19.6 m/s / 2 s a = 9.8 m/s²
Therefore, the average acceleration of the ball is 9.8 m/s².