5th Edition

ISBN: 9780321976444

Author: James S. Walker

Publisher: PEARSON

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In nature, every object is attracted by every other object. This phenomenon is called gravity. The force associated with gravity is called gravitational force. The gravitational force is the weakest force that exists in nature. The gravitational force is…

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Chapter 12, Problem 89GP

Three identical stars, at the vertices of an equilateral triangle, orbit about their common center of mass (Figure 12-41). Find the period of this orbital motion in terms of the orbital radius, R, and the mass of each star, M.

Chapter 12, Problem 89GP, Three identical stars, at the vertices of an equilateral triangle, orbit about their common center

Figure 12-41 Problem 89

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Chapter 12, Problem 88GP

Chapter 12, Problem 90GP

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**68 @ Two small spaceships, each with mass m = 2000 kg, are in the circular Earth orbit of Fig. 13-51, at an altitude h of 400 km. Igor, the commander of one of the ships, arrives at any fixed point in the orbit 90 s ahead of Picard, the commander of the other ship. What are the (a) period To and (b) speed Vo of the ships? At point P in Fig. 13-51, Picard fires an instanta- neous burst in the forward direction, reducing his ship's speed by 1.00%. After this burst, he follows the ellip- tical orbit shown dashed in the fig- ure. What are the (c) kinetic energy and (d) potential energy of his ship immediately after the burst? In Picard's new elliptical orbit, what are (e) the total energy E, (f) the semimajor axis a, and (g) the orbital peripd T? (h) How much earlier than Igor will Picard return to P? Figure 13-51 Problem 68.

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68 Two small spaceships, each with mass m = 2000 kg, are in the circular Earth orbit of Fig. 13-50, at an altitude h of 400 km. Igor, the commander of one of the ships, arrives at any fixed point in the orbit 90 s ahead of Picard, the commander of the other ship. What are the (a) period T, and (b) speed Vo of the ships? At point P in Fig. 13-50, Picard fires an instantaneous R M burst in the forward direction, re- ducing his ship's speed by 1.00%. After this burst, he follows the el- liptical orbit shown dashed in the figure. What are the (c) kinetic en- ergy and (d) potential energy of his ship immediately after the burst? In Picard's new elliptical orbit, what are (e) the total energy E, (f) the semimajor axis a, and (g) the orbital period T? (h) How much earlier than Igor will Picard return to P? Fig. 13-50 Problem 68.

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Three identical stars, at the vertices of an equilateral triangle, orbit about their common center of mass ( Figure 12-41 ). Find the period of this orbital motion in terms of the orbital radius, R, and the mass of each star, M . Figure 12-41 Problem 89

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