1. In Example 13.2 (p. 363), if instead the rocket launched from the Earth at 12
ID: 1499381 • Letter: 1
Question
1. In Example 13.2 (p. 363), if instead the rocket launched from the Earth at 12,000 m/s, what would happen once it reached a distance infinitely far away from Earth. A. The rocket would not be able to reach deep space at this launch speed B. When this rocket is an infinite distance away from Earth, the rocket would have some kinetic energy and some gravitational potential energy C. When this rocket is an infinite distance away from Earth,, the rocket would have some kinetic energy and no gravitational potential energy D. When this rocket is an infinite distance away from Earth, the rocket would have no kinetic energy and no gravitational potential energy
2.In Figure 13.16 (p. 365), what is the total energy of the orbiting satellite? (Assume your system is the satellite + the Earth.)
A. 0 J B. It Depends on the speed of the orbiting satellite. C. Less than 0 J (a negative value) D. More than 0 J (a positive value)Explanation / Answer
(1)
The option (C) is corect. When this rocket is an infinite distance away from Earth,, the rocket would have some kinetic energy and no gravitational potential energy.
(2)
The total energy is,
TE=PE+KE
=-GMm/r +GMm/2r = - GMm/2r
Therefore, the option C that is negative is correct.
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