Answer :
Final answer:
The ball is going at a speed of approximately 18.9 m/s when it hits the ground.
Explanation:
The equation to calculate the final velocity of a falling object is:
v = sqrt(2 × g × h)
Where v is the final velocity, g is the acceleration due to gravity (approximately 9.8 m/s^2), and h is the height from which the object was dropped.
Plugging in the values from the question:
v = sqrt(2 × 9.8 × 17.2) ≈ 18.9 m/s
Therefore, when the ball hits the ground, it is going at a speed of approximately 18.9 m/s.
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