Answer:
19.80 m/s
Explanation:
From the question given above, the following data were obtained:
Height of each floor = 2 m
Total Height (h) = 2 × 10 = 20 m
Initial velocity (u) = 0 m/s
Acceleration due to gravity (g) = 9.8 m/s²
Final velocity (v) =?
The velocity at which the ball will hit the ground can be obtained as follow:
v² = u² + 2gh
v² = 0² + (2 × 9.8 × 20)
v² = 0 + 392
v² = 392
Take the square root of both side
v = √392
v = 19.80 m/s
Thus, the ball will hit the ground with a velocity of 19.80 m/s
