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Lingz
19.12.2019 •
Mathematics
If a baseball is batted at an angle of 35° to
the ground, the distance the ball travels
can be estimated using the equation
d = 0.0034s2 + 0.004s – 0.3, where s is the
bat speed, in kilometres per hour, and d is
the distance flown, in metres. at what speed
does the batter need to hit the ball in order
to have a home run where the ball-flies
125 m? round to the nearest tenth.
Solved
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Ответ:
Step-by-step explanation:
We have distance flown, in meters
d = 0.0034s² + 0.004s - 0.3
where s is the bat speed, in kilometres per hour.
We need to find s when d = 125 m.
Substituting
d = 0.0034s² + 0.004s - 0.3
125 = 0.0034s² + 0.004s - 0.3
0.0034s² + 0.004s - 125.3 = 0
s = 191.38 kmph or s = -192.56 kmph ( Not possible)
The batter need to hit the ball at a speed 191.4 kmph
Ответ: