Question

FUS After takeoff, an aircraft enters a straight-line flight path with constant speed at point P(1.5|9|0.5). speed. In one minute it travels a distance vector v=(-1 5 0.2) back. Information in km. a) (1) Determine the speed of the aircraft in km/h. (2) After 4 minutes the plane reaches a big city. Calculate the altitude at this time. b) At an altitude of 2500 m the pilot switches to autopilot. Calculate the coordinates of the point where the aircraft is at this moment and state how much time has passed since the aircraft was at point P. c) Between the points A(-5|38|0.1), B(-4|40|0.11) and C (-7|39|0.1) there is a small natural protected area in the shape of a triangle. (1) Examine triangle ABC for special features. (2) Check whether the aircraft is flying over route AB and, if so, at what distance

60

likes
301 views

Answer to a math question FUS After takeoff, an aircraft enters a straight-line flight path with constant speed at point P(1.5|9|0.5). speed. In one minute it travels a distance vector v=(-1 5 0.2) back. Information in km. a) (1) Determine the speed of the aircraft in km/h. (2) After 4 minutes the plane reaches a big city. Calculate the altitude at this time. b) At an altitude of 2500 m the pilot switches to autopilot. Calculate the coordinates of the point where the aircraft is at this moment and state how much time has passed since the aircraft was at point P. c) Between the points A(-5|38|0.1), B(-4|40|0.11) and C (-7|39|0.1) there is a small natural protected area in the shape of a triangle. (1) Examine triangle ABC for special features. (2) Check whether the aircraft is flying over route AB and, if so, at what distance

Expert avatar
Santino
4.5
112 Answers
a)
(1) Zur Bestimmung der Geschwindigkeit des Flugzeugs in km/h teilen wir die zurückgelegte Strecke durch die Zeit:
\text{Geschwindigkeit } = \frac{\text{Strecke}}{\text{Zeit}} = \frac{\|\textbf{v}\|}{\text{Zeit}}

Gegeben: $\textbf{v} = (-1, 5, 0.2)$ km und Zeit = 1 Minute = 1/60 Stunde.

Berechnung der Geschwindigkeit:
\|\textbf{v}\| = \sqrt{(-1)^2 + 5^2 + 0.2^2} = \sqrt{1 + 25 + 0.04} = \sqrt{26.04} \approx 5.10 \text{ km}
\text{Geschwindigkeit} = \frac{5.10}{1/60} = 5.1 \times 60 = 306 \text{ km/h}

(2) Die Flughöhe nach 4 Minuten beträgt:
Höhe = 9 + (4 * 0.2) = 9.8 km

b)
Bei einer Höhe von 2500 m = 2.5 km schalten wir auf Autopilot um.

Die Koordinaten des Flugzeugs ergeben sich durch Addition des Vektors $\textbf{v}$ zum Punkt P:
(1 + (-1), 5 + 5, 0.5 + 0.2) = (0, 10, 0.7)

Die Zeit, die seit dem Punkt P vergangen ist, beträgt:
\frac{\sqrt{(0-1)^2 + (10-5)^2 + (0.7-0.5)^2}}{5.1} = \frac{\sqrt{1 + 25 + 0.04}}{5.1} \approx \frac{\sqrt{26.04}}{5.1} \approx \frac{5.1}{5.1} \approx 1 \text{ Stunde}

c)
(1)
Das Dreieck ABC ist ein gleichschenkliges Dreieck, da AB und BC jeweils die gleiche Länge haben.

(2)
Um zu prüfen, ob das Flugzeug die Strecke AB überfliegt, betrachten wir den Abstand des Flugzeugs von der Linie, die durch die Punkte A und B verläuft. Der Abstand kann durch den Normalenvektor auf die Ebene von A und B bestimmt werden.

Den Normalenvektor der Ebene bestimmen:
\textbf{n} = (A-B) \times (A-C) = \begin{pmatrix} -5+4 \ 38-40 \ 0.1-0.11 \end{pmatrix} \times \begin{pmatrix} -5+7 \ 38-39 \ 0.1-0.1 \end{pmatrix} = \begin{pmatrix} -1 \ -2 \ -0.01 \end{pmatrix} \times \begin{pmatrix} 2 \ -1 \ 0 \end{pmatrix}
= \begin{pmatrix} 0.01 \ -0.02 \ -3 \end{pmatrix}

Der Abstand des Flugzeugs von der Ebene beträgt:
\frac{| \textbf{n} \cdot (P - A) |}{\|\textbf{n}\|} = \frac{| \begin{pmatrix} 0.01 \ -0.02 \ -3 \end{pmatrix} \cdot \begin{pmatrix} 1 \ 5 \ 0.5 \end{pmatrix} - \begin{pmatrix} 0.01 \ -0.02 \ -3 \end{pmatrix} \cdot \begin{pmatrix} -5 \ 38 \ 0.1 \end{pmatrix} |}{\sqrt{0.01^2 + (-0.02)^2 + (-3)^2}}

= \frac{| (0.01 \cdot 1 + (-0.02) \cdot 5 + (-3) \cdot 0.5) - (0.01 \cdot (-5) + (-0.02) \cdot 38 + (-3) \cdot 0.1) |}{\sqrt{0.01^2 + (-0.02)^2 + (-3)^2}}

= \frac{| 0.01 - 0.1 + 1.5 - 0.76 |}{\sqrt{0.01^2 + (-0.02)^2 + (-3)^2}} = \frac{| 2.67 |}{\sqrt{9.05}} \approx \frac{2.67}{3} \approx 0.89 \text{ km}

Antwort: a) (1) Die Geschwindigkeit des Flugzeugs beträgt 306 km/h.
b) Nach 4 Minuten beträgt die Flughöhe 9.8 km. Die Koordinaten des Flugzeugs sind (0, 10, 0.7) und es ist 1 Stunde vergangen, seit es sich im Punkt P befand.
c) (1) Das Dreieck ABC ist gleichschenklig.
(2) Das Flugzeug überfliegt die Strecke AB in einem Abstand von etwa 0.89 km.

Frequently asked questions (FAQs)
What is the resultant vector when a vector of magnitude 5 and direction 30° is added to a vector of magnitude 3 and direction 60°?
+
In a 2D coordinate system, if vector A= and vector B=, what is the dot product of vectors A and B?
+
What is the area of the region bounded by the hyperbolic function y = cosh(x) and the x-axis in the interval [-2, 2]?
+
New questions in Mathematics
A normal random variable x has a mean of 50 and a standard deviation of 10. Would it be unusual to see the value x = 0? Explain your answer.
a ferry travels 1/6 of the distance between two ports in 3/7 hour. the ferry travels at a constant rate. at this rate, what fraction of the distance between the two ports can the ferry travel in one hour?
A person who weighs 200 pounds on earth would weigh about 32 pounds on the moon. Find the weight of a person on earth who would weigh 15 pounds on the moon.
Karina has a plot of 5,000 square meters in which she has decided that 60% of it will be used to plant vegetables. Of this part, 12% will be dedicated to planting lettuce. How much surface area of the plot will be used for cultivation?
I) Find the directional derivative of 𝑓(𝑥, 𝑦) = 𝑥 sin 𝑦 at (1,0) in the direction of the unit vector that make an angle of 𝜋/4 with positive 𝑥-axis.
Suppose the horses in a large stable, have a mean weight of a 807 pounds and a variance of 5776. What is the probability that the mean weight of the sample of horses with differ from the population mean by greater than 18 pounds is 41 horses are sampled at random from the stable round your answer to four decimal places.
Suppose SAT reading scores are normally distributed with a mean of 496 and a standard deviation of 109. The University plans towards scholarships for students who scores are in the top 7%. What is the minimum score required for the scholarship round your answer to the nearest whole number.
Log(45)
Suppose that you use 4.29 g of Iron in the chemical reaction: 2Fe(s) + 3 Cu2 + (aq) 2Fe 3 + (aq) + 3Cu(s ) - . What is the theoretical yield of Cu (s), in grams?
sum of 7a-4b+5c, -7a+4b-6c
In a 24 hours period, the average number of boats arriving at a port is 10. Assuming that boats arrive at a random rate that is the same for all subintervals of equal length (i.e. the probability of a boat arriving during a 1 hour period the same for every 1 hour period no matter what). Calculate the probability that more than 1 boat will arrive during a 1 hour period. (P(X>1) ) Give your answers to 4 decimal places and in a range between 0 and 1
Let X be a discrete random variable such that E(X)=3 and V(X)=5. Let 𝑌 = 2𝑋^2 − 3𝑋. Determine E(Y).
find missing measure for triangle area = 48 m square base = 10m heaighy = ? m
Total Users with an active Wise account = Total Active Users + Total Users who haven’t transacted Total Active Users = Total MCA Users + Total Send Users = Total New Users + Retained Users Total New Users = New Send Users + New MCA Users Total MCA Users = New MCA Users + Retained Users who transacted this month via MCA Total Send Users = New Send Users + Retained Users who transacted this month via Send Send CR = Total Send Users / Total Users with an active Wise account MCA CR = Total MCA Users / Total Users with an active Wise account New Send CR = New Send Users / New Profiles Created in Month New MCA CR = New MCA Users / New Profiles Created in Month We have recently witnessed a drop in MCA conversion, but send user conversion is stable, can you help explain why?
Let G be the center of gravity of triangle ABC. We draw through A a parallel to BC on which we take a point D so that DG⊥BG. If the area of the quadrilateral AGBD is equal to s, show that AC·BD≥2·s.
To paint a 250 m wall, a number of workers were employed. If the wall were 30 m longer, 9 more workers would be needed. How many were employed at the beginning?
How much does 7.2 moles of ammonium dichromate weigh? (NH4)2Cr2O7
question 1 Consider a sample space S, and two events A and B such that P(A ∩ B) = 0.2, P(A ∪ B) = 0.6, P(B ∪ ̄A) = 0.8 (a) [0.5 points] Calculate P (A). (b) [0.5 points] Calculate P (B)
Find the distance from the point (2,-1) to the line 2x-5y+10=0
Mark is gluing a ribbon around the sides of a picture frame. The frame is 11 inches long and 7 includes wide. How much ribbon does Mark need?