1. The Launchtime company has just completed work on its newest rocket, the Sagittar- ius VII. Designed by exacting standards to be sleek and aerodynamic, the rocket is rotationally symmetric about its midline, and when its elevation view is depicted in the x-y plane (in which the unit distance is 1 meter), the shape exactly coincides with the region bounded by the graphs of 2400 and 5 16+ x2 y = 0. (a) Make a sketch of the Sagittarius VII. How tall is it? (b) What is the total volume of the rocket? (c) If the average density of the ship is 2500 kg/m³, what is the mass of the rocket?
1. The Launchtime company has just completed work on its newest rocket, the Sagittar- ius VII. Designed by exacting standards to be sleek and aerodynamic, the rocket is rotationally symmetric about its midline, and when its elevation view is depicted in the x-y plane (in which the unit distance is 1 meter), the shape exactly coincides with the region bounded by the graphs of 2400 and 5 16+ x2 y = 0. (a) Make a sketch of the Sagittarius VII. How tall is it? (b) What is the total volume of the rocket? (c) If the average density of the ship is 2500 kg/m³, what is the mass of the rocket?
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:1. The Launchtime company has just completed work on its newest rocket, the Sagittar-
ius VII. Designed by exacting standards to be sleek and aerodynamic, the rocket is
rotationally symmetric about its midline, and when its elevation view is depicted in
the x-y plane (in which the unit distance is 1 meter), the shape exactly coincides with
the region bounded by the graphs of
2400
and
y =
16 + x2
y = 0.
(a) Make a sketch of the Sagittarius VII. How tall is it?
(b) What is the total volume of the rocket?
(c) If the average density of the ship is 2500 kg/m³, what is the mass of the rocket?
1
The engineers at Launchtime want to determine how much work (in J) must necessarily
be done for the Sagittarius to journey from the Earth's surface to deep space (i.e., very
far away). The Earth's radius is about 6380 km. The gravitational force (in N) exerted
by the Earth on the rocket is given by the expression
GmM
F(r) :
r2
where G is the gravitational constant 6.67 x 10-11, m is the mass of the rocket (in kg),
M = 6 x 1024 is the mass of the Earth (in kg), and r is the distance (in m) between the
rocket and Earth. Assume that the rocket doesn't get too close to any massive bodies
other than Earth (and therefore isn't influenced by their gravitational fields) and that
the mass of the burning fuel exiting the rocket is negligible compared to the rocket's
mass (due to the use of the new radioactive superfuel Elezium).
(d) Help the engineers by determining the amount of work required to make the
journey.
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