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sixtomomtermont
03.04.2021 •
Mathematics
A ball is launched upward at 26 ft/sec from a platform that is 12 feet high. When will the ball hit the ground
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Ответ:
9.4 seconds or 1 second
Step-by-step explanation:
From;
h = ut ± 1/2gt^2
h = 12 feet
g = acceleration due to gravity = 10 m/s^2
u = 26 ft/sec
Since it is an upward motion g is negative
12 = 26t - 5t^2
Hence;
5t^2 - 26t + 12 = 0
Solving the quadratic equation
Considering that the time taken to go up is the same time taken to hit the ground again
t = 2(4.7) seconds or t = 2(0.5) seconds
t = 9.4 seconds or 1 second
Ответ: