Lizethh1
26.03.2021 •
Mathematics
PLEASEEE HELPO I DONT UNDERSTAND????
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Ответ:
A) 11.25 m
B) 3.4s
C) 0.75
Step-by-step explanation:
A) Put in given time. Then, y = 11.25m
B) If the object is at ground, then y = 0.
So, 0 = 17t - 5t^2 => t = 0 or 3.4 [ 0s is initial height, so it's not valid ]
C) H1 = 17*(1.5+1) - 5*((1.5+1)^2) = 11.25
H2 = 17*1 - 5*(1^2) = 12
H2 - H1 = 0.75