gibbss80stu
16.07.2021 •
Mathematics
A plane has a takeoff speed of 324km/h and requires 1.35km to reach that speed. Determine the acceleration of the plane and the time required to reach this speed.[4]
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Ответ:
If the plane is starting from rest, then the acceleration a that it needs in order to speed up to 324 km/h = 90.0 m/s over a distance of 1.35 km = 1350 m satisfies
(90.0 m/s)² = 2a (1350 m) ==> a = 3.00 m/s²
(use the kinematic equation, v ² - v₀² = 2a ∆x)
and the amount of time t needed to reach this speed is such that
90.0 m/s = (3.00 m/s²) t ==> t = 30.0 s
(v = v₀ + at )
Ответ:
A. Carmen is driving at a faster rate than Brandon.
B. The difference in the y-intercepts represents the difference between the distances of Brandon's and Carmen's homes to Arches National Park.