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1230bering
13.02.2020 •
Mathematics
If p(x) = 3x + 2 and g(x) = x2 - 9, find (f - g)(x).
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Ответ:
you may figure out the time needed for the ball to reach zero vertical velocity by dividing the initial velocity by the acceleration
t = v₀/g
where you will find that the ball takes 2.275 seconds to come to momentary rest.
you may now use
y = y₀ + v₀t + ½at²
to find that the maximum altitude above the kicker is
y = 25.4 m
or you might use another kinematic equation which does not need the time value to get the result
v² = v₀² + 2as
s = (v² - v₀²) / 2a
s = (0² - 22.3²) / 2(-9.8)
s = 25.4 m
you have two different initial velocities in your question. if the correct one is actually 22.4 m/s, then the height result will be slightly greater at 25.6 m