Answer:
29.43 m/s
Step-by-step explanation:
The velocity of the ball just before it strikes the ground can be found using the formula for free fall:
v = gt
where v is the velocity of the ball just before it strikes the ground, g is the acceleration due to gravity (9.81 m/s^2), and t is the time it takes for the ball to reach the ground (3.0 s).
Substituting the given values into the formula, we get:
v = gt
v = 9.81 m/s^2 × 3.0 s
v = 29.43 m/s
Therefore, the velocity of the ball just before it strikes the ground is 29.43 m/s.