SPST201 quiz 3
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School
American Public University *
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Course
201
Subject
Mathematics
Date
Apr 3, 2024
Type
Pages
6
Uploaded by 32denny
Quiz 3 - Results
Attempt 1 of 1
Written Dec 19, 2023 7:11 PM - Dec 19, 2023 8:08 PM
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Question 1
6 / 6 points
Newton's First Law of Motion discusses the principle of
Question 2
6 / 6 points
___
right___ ___
hand___ ___
rule___
Question 3
7 / 7 points
A perfect score. If desired, schedule a meeting with me via email or Microsoft Teams to
go over this assignment. Make sure you know how to get the correct answer for every
problem. Energy
Gravitation
Momentum
Force
We find the direction of the angular velocity vector and the angular momentum vector
by using the ".
What is Newton's Law of Universal Gravitation? Include and explain the mathematical
equation in your answer.
Question 4
7 / 7 points
The mass of an object denotes three things. State all three
Question 5
8 / 8 points
How fast would a 50kg bicycle have to travel to have the same linear momentum as a
1500 kg car moving at 25 m/s?
Newton's Law of Universal Gravitation explains how every object in the universe
attracts every other object with a gravitational force. This force depends on the
masses of the objects and the distance between them. The more massive the
objects, the stronger the force. However, the force gets weaker as the objects move
farther apart. The equation is as follows:
is the force of gravity
G
is the universal gravitational constant are the masses of the bodies
R is the distance between the bodies
The mass of an object denotes how much stuff an object has, it's inertia, and it's
gravitational attraction
Question 6
6 / 6 points
The apogee is the point of closest approach of the spacecraft to the occupied focus
True
False
Question 7
7 / 7 points
Explain the difference between kinetic and potential energy?
Question 8
7 / 7 points
Describe the terms semi major axis and eccentricity? Include and explain equations for
both.
Potential energy is the objects position such as a dumbell suspended 100 feet in the
air. it is also known as "the energy an object in a conservative field has entirely
because of its position".
kinetic energy is the objects motion such as the dumbell falling from 100 feet in the
air. it is also known as "a function of an object's mass and its velocity".
Semimajor axis describes the size of the orbit with a minimum value of 6508km for a
stable orbit around Earth. The size of an orbit relates to its specific mechanical
energy using the following equation: Eccentricity is the shape of an orbit, for example, circular or elliptical. To calculate
eccentricity you need to define the eccentricity vector with the following equation:
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Question 9
7 / 7 points
List and briefly describe the four items on the classic orbital elements checklist.
Question 10
7 / 7 points
= eccentricity vector
μ = gravitational parameter (km3/s2) ≈ 3.986 × 105 km3/s2 for Earth
V = magnitude of (km/s)
R = magnitude of (km)
= position vector (km)
= velocity vector (km/s)
You should also state what the variable 'a' is even if it's obvious. In your e vector
formula it's actually instead of R x V. There is a big difference between the two.
Orbits Size: its Semimajor axis
Orbits Shape; its eccentricity
Orbits Orientation: the orbital plane in space (its inclination and right ascension of
the ascending node) as well as the orbit within the plane (the argument of perigee)
Spacecrafts Location: this can be found using the True Anomaly
What type of orbit has an inclination between 0 and 90 degrees? At 90 degrees?
Question 11
6 / 6 points
When the specific mechanical energy < 0, the orbit is considered:
Question 12
6 / 6 points
___
argument___ ___
of___ ___
perigee___
Question 13
7 / 7 points
What is the difference between a geostationary orbit and a geosynchronous orbit?
Question 14
6 / 6 points
___
nodal___ ___
displacement___
Question 15
7 / 7 points
Which of the following is NOT a classic orbital element:
between 0 and 90 degrees would be a Direct or Prograde orbit while at 90 degrees
it is a Polar orbit
Circular or elliptical
Parabolic
Hyperbolic
None of the above
The angle along the orbital path between the ascending node and perigee is called the
a geostationary orbit has a spacecraft orbiting at the same rate at which the Earth
rotates, resulting in the spacecraft maintaining a position over the same spot of the
Earth throughout its orbit.
A geosynchronous orbit is an inclined orbit with a period of about 24 hours. the
same period as a geostationary orbit
By measuring how much the orbit's ground track moves to the west from one orbit to
the next, we use
Done
Semimajor axis
True longitude
Right ascension of the ascending node
True anomaly
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