UNIVERSITY PHYSICS UCI PKG
11th Edition
ISBN: 9781323575208
Author: YOUNG
Publisher: PEARSON C
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Question
Chapter 13, Problem 13.67P
(a)
To determine
The periods of the spacecraft.
(b)
To determine
The ratio of spacecraft’s speed at perigee to its speed at apogee.
(c)
To determine
The speed of the spacecraft at the perigee and apogee.
(d)
To determine
The efficient way for the escaping of the spacecraft.
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Very far from earth (at R=∞), a spacecraft has run out of fuel and its kinetic energy is zero. If only the gravitational force of the earth were to act on it (i.e., neglect the forces from the sun and other solar system objects), the spacecraft would eventually crash into the earth. The mass of the earth is Me and its radius is Re. Neglect air resistance throughout this problem, since the spacecraft is primarily moving through the near vacuum of space.
Find the speed se of the spacecraft when it crashes into the earth.
Express the speed in terms of Me, Re, and the universal gravitational constant G. Use a conservation-law approach. Specifically, consider the mechanical energy of the spacecraft when it is (a) very far from the earth and (b) at the surface of the earth.
Very far from earth (at R=∞), a spacecraft has run out of fuel and its kinetic energy is zero. If only the gravitational force of the earth were to act on it (i.e., neglect the forces from the sun and other solar system objects), the spacecraft would eventually crash into the earth. The mass of the earth is Me and its radius is Re. Neglect air resistance throughout this problem, since the spacecraft is primarily moving through the near vacuum of space.
Find the speed se of the spacecraft when it crashes into the earth.
Express the speed in terms of Me, Re, and the universal gravitational constant G.
Now find the spacecraft's speed when its distance from the center of the earth is R=αRe, where the coefficient α≥1.
Express the speed in terms of se and α.
consider a spacecraft in an elliptical orbit around the earth. At the low point, or perigee, of its orbit, it is 300 km above the earth's surface; at the high point or apogee, it is 2500 km above the earth's surface.
Part A: find ratio of the spacecraft's speed at perigee to its speed at apogee?
(Vperigee / Vapogee) = .....
Part B: find the speed at the apogee?
V apogee = ........ m/s
Part C: find speed at perigee?
V perigee = ..... m/s
Chapter 13 Solutions
UNIVERSITY PHYSICS UCI PKG
Ch. 13.1 - The planet Saturn has about 100 times the mass of...Ch. 13.2 - Rank the following hypothetical planets in order...Ch. 13.3 - Prob. 13.3TYUCh. 13.4 - Prob. 13.4TYUCh. 13.5 - The orbit of Comet X has a semi-major axis that is...Ch. 13.6 - In the classic 1913 science-fiction novel At the...Ch. 13.7 - Imagine a planet that has the same mass and radius...Ch. 13.8 - If the sun somehow collapsed to form a black hole,...Ch. 13 - A student wrote: The only reason an apple falls...Ch. 13 - If all planets had the same average density, how...
Ch. 13 - Is a pound of butler on the earth the same amount...Ch. 13 - Example 13.2 (Section 13.1) shows that the...Ch. 13 - When will you attract the sun more: today at noon,...Ch. 13 - Since the moon is constantly attracted toward the...Ch. 13 - Prob. 13.7DQCh. 13 - A planet makes a circular orbit with period T...Ch. 13 - The sun pulls on the moon with a force that is...Ch. 13 - Which takes more fuel: a voyage from the earth to...Ch. 13 - Prob. 13.11DQCh. 13 - Does the escape speed for an object at the earths...Ch. 13 - If a projectile is fired straight up from the...Ch. 13 - Discuss whether this statement is correct: In the...Ch. 13 - The earth is closer to the sun in November than in...Ch. 13 - A communications firm wants to place a satellite...Ch. 13 - Prob. 13.17DQCh. 13 - What would Keplers third law be for circular...Ch. 13 - In the elliptical orbit of Comet Hailey shown in...Ch. 13 - Many people believe that orbiting astronauts feel...Ch. 13 - As part of their training before going into orbit,...Ch. 13 - What is the ratio of the gravitational pull of the...Ch. 13 - CP Cavendish Experiment. 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A hammer with mass m is dropped...Ch. 13 - Prob. 13.62PCh. 13 - Prob. 13.63PCh. 13 - Prob. 13.64PCh. 13 - Prob. 13.65PCh. 13 - The planet Uranus has a radius of 25,360 km and a...Ch. 13 - Prob. 13.67PCh. 13 - A rocket with mass 5.00 103 kg is in a circular...Ch. 13 - A 5000-kg spacecraft is in a circular orbit 2000...Ch. 13 - Prob. 13.70PCh. 13 - CALC Planets are not uniform inside. Normally,...Ch. 13 - One of the brightest comets of the 20th century...Ch. 13 - CALC An object in the shape of a thin ring has...Ch. 13 - CALC A uniform wire with mass M and length L is...Ch. 13 - Prob. 13.75PCh. 13 - DATA For each of the eight planets Mercury to...Ch. 13 - DATA For a spherical planet with mass M, volume V,...Ch. 13 - DATA For a planet in our solar system, assume that...Ch. 13 - Interplanetary Navigation. The most efficient way...Ch. 13 - CP Tidal Forces near a Black Hole. An astronaut...Ch. 13 - CALC Mass M is distributed uniformly over a disk...Ch. 13 - EXOPLANETS. As planets with a wide variety of...Ch. 13 - EXOPLANETS. As planets with a wide variety of...Ch. 13 - EXOPLANETS. As planets with a wide variety of...
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