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Sagot :
The ball is 3.16 seconds in the air before it hits the ground.
What was gravity according to Albert Einstein?
GETTING A Grip According to Einstein's general theory of relativity, matter or energy causes a distortion of space (or more specifically, spacetime) known as gravity. A large item produces a gravitational field by distorting the geometry of the spacetime it is located in.
Galileo's description of gravity
Galileo is credited with demonstrating that gravity causes objects of varying masses to fall with the same acceleration by dropping weights from the Leaning Tower of Pisa.
Solution:
Upward
v = v o - g t
0 m/s = 15 m/s - 9.81 m/s² · t
15 m/s = 9.81 m/s² · t
t = 15 m/s : 9.81 m/s²
t 1 = 1.53 s
h = v o · t - g t² / 2 + 2 m
h = 22.95 m - (9.81 m/s² · 2.3409 s²) / 2 + 2 m
h = 11.475 m + 2 m = 13.475 m
Downward:
13.475 m = 9.81 · t² / 2
t = √(13.475 · 2 ) / 9.81
t 2 = 1.66 s
t = t 1 + t 2 = 1.53 s + 1.66 s = 3.19 s
Learn more about Acceleration due to gravity here:
brainly.com/question/13860566
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