Loose Leaf For Explorations: Introduction To Astronomy
9th Edition
ISBN: 9781260432145
Author: Thomas T Arny, Stephen E Schneider Professor
Publisher: McGraw-Hill Education
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Chapter 3, Problem 12P
To determine
The escape velocity ratio between the Moon and the Earth.
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An object of mass m is launched from a planet of mass M and radius R.
a)Derive and enter an expression for the minimum launch speed needed for the object to escape gravity, i.e. to be able to just reach r = ∞.
b)Calculate this minimum launch speed (called the escape speed), in meters per second, for a planet of mass M = 6 × 1023 kg and R = 76 × 104 km.
(a) What is the escape speed on a spherical asteroid whose radius is 500 km and whose gravitational acceleration at the surface is 3.0 m/s2? (b) How far from the surface will a particle go if it leaves the asteroid’s surface with a radial speed of 1000 m/s? (c) With what speed will an object hit the asteroid if it is dropped from 1000 km above the surface?
(a) What is the escape speed on a spherical asteroid whose radius is 624 km and whose gravitational acceleration at the surface is
0.767 m/s?? (b) How far from the surface will a particle go if it leaves the asteroid's surface with a radial speed of 734 m/s? (c) With
what speed will an object hit the asteroid if it is dropped from 473.5 km above the surface?
(a) Number
i
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(b) Number
i
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(c) Number
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Chapter 3 Solutions
Loose Leaf For Explorations: Introduction To Astronomy
Ch. 3 - What is meant by inertia?Ch. 3 - (3.1) What does Newtons first law of motion tell...Ch. 3 - Explain how inertia and gravity are both involved...Ch. 3 - How does mass differ from weight?Ch. 3 - If your mass is 70 kg on Earth, what is it on the...Ch. 3 - What is Newtons law of gravity?Ch. 3 - Prob. 7QFRCh. 3 - (3.7) If you weigh 110 pounds on Earth, do you...Ch. 3 - Prob. 9QFRCh. 3 - Prob. 10QFR
Ch. 3 - Prob. 1TQCh. 3 - Prob. 2TQCh. 3 - (3.2) Is there a force of gravity between the...Ch. 3 - (3.3) Use Newtons second law of motion to explain...Ch. 3 - (3.4) How many times greater is Earths...Ch. 3 - Prob. 6TQCh. 3 - Prob. 7TQCh. 3 - Prob. 8TQCh. 3 - Prob. 9TQCh. 3 - Prob. 10TQCh. 3 - Prob. 11TQCh. 3 - (3.3) If you apply a force F to a mass m, it...Ch. 3 - Prob. 2PCh. 3 - Prob. 3PCh. 3 - Prob. 4PCh. 3 - Prob. 5PCh. 3 - (3.6) Gliese 581e is an exoplanet with a mass of...Ch. 3 - (3.7) Using the method of section 3.7, compare the...Ch. 3 - Prob. 8PCh. 3 - Prob. 9PCh. 3 - Prob. 10PCh. 3 - Prob. 11PCh. 3 - Prob. 12PCh. 3 - Prob. 13PCh. 3 - Prob. 1TYCh. 3 - Prob. 2TYCh. 3 - Prob. 3TYCh. 3 - Prob. 4TYCh. 3 - Prob. 5TYCh. 3 - Prob. 6TYCh. 3 - Prob. 7TYCh. 3 - Prob. 8TYCh. 3 - Prob. 9TY
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- It was stated that a satellite with negative total energy is in a bound orbit, whereas one with zero or positive total energy is in an unbounded orbit. Why zero or positive total energy is in an unbounded orbit. Why is this true? What choice for gravitational potential energy was made such that this is true?arrow_forwardLet gM represent the difference in the gravitational fields produced by the Moon at the points on the Earths surface nearest to and farthest from the Moon. Find the fraction gM/g, where g is the Earths gravitational field. (This difference is responsible for the occurrence of the lunar tides on the Earth.)arrow_forwardCheck Your Understanding The nearly circular orbit of Saturn has an average radius of about 9.5 AU and has a period of 30 years, whereas Uranus averages about 19 AU and has a period of 84 years. Is this consistent with our results for Halley’s comet?arrow_forward
- A planet has two moons with identical mass. Moon 1 is in a circular orbit of radius r. Moon 2 is in a circular orbit of radius 2r. The magnitude of the gravitational force exerted by the planet on Moon 2 is (a) four times as large (b) twice as large (c) the same (d) half as large (e) one-fourth as large as the gravitational force exerted by the planet on Moon 1.arrow_forwardShow that the areal velocity for a circular orbit of radius r about a mass M is At=12GMr . Does your expression give the correct value for Earth’s areal vilocity about the Sun?arrow_forwardCheck Your Understanding By what factor must the radius change to reduce the orbital velocity of a satellite by one-half? By what factor would this change the period?arrow_forward
- What will be the escape velocity from the surface of the moon if it is 11.2 km/s at the surface of the earth? Assume that g at the surface of the moon is /5 that at the surface of the earth and the radius of the moon is '/4 that of the earth.arrow_forwardAn object on a certain planet has an escape speed of V. If another planet has twice the radius and twice the mass of the first planet, the escape speed will be?arrow_forwardAssume a new planet discovered has a mass (1/81) that of Earth and a radius (1/4) that of Earth. Estimate the escape speed for a spacecraft from the surface of that planet. The escape speed from the surface of the Earth is 11.2 km/s.arrow_forward
- (a) What is the escape speed on a spherical asteroid whose radius is 106 km and whose gravitational acceleration at the surface is 0.104 m/s²? (b) How far from the surface will a particle go if it leaves the asteroid's surface with a radial speed of 107 m/s? (c) With what speed will an object hit the asteroid if it is dropped from 2168 km above the surface? (a) Number (b) Number i (c) Number i Textbook and Modia Units Units Unitsarrow_forwardFind the speed (in m/s) needed to escape from the solar system starting from the surface of Uranus. Assume there are no other bodies involved, and do not account for the fact that Uranus is moving in its orbit. [Hint: - 26M does not apply. Use conservation Vesc R of energy, and include the potential energy of both Uranus and the Sun.] m/sarrow_forward(a) What is the escape speed on a spherical asteroid whose radius is 103 km and whose gravitational acceleration at the surface is 0.129 m/s²? (b) How far from the surface will a particle go if it leaves the asteroid's surface with a radial speed of 101 m/s? (c) With what speed will an object hit the asteroid if it is dropped from 1588 km above the surface? (a) Number (b) Number (c) Number IN i Units Units Unitsarrow_forward
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