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Author Question: A 50-kg satellite circles the Earth in an orbit with a period of 120 min. What minimum energy is ... (Read 105 times)

kshipps

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on: Jul 28, 2018
A 50-kg satellite circles the Earth in an orbit with a period of 120 min. What minimum energy is required to change the orbit to another circular orbit with a period of 180 min? (Earth: radius = 6.4  106 m, mass = 6.0  1024 kg)
 a. 2.9  108 J
  b. 3.5  108 J
  c. 4.1  108 J
  d. 4.7  108 J
  e. 5.9  108 J

Question 2

An object is released from rest when it is a height h above the surface of a planet of mass M and radius R. What is the speed of the object just before striking the surface of the planet? Neglect any air resistance. Let h = 4.0  106 m, R = 5.0  106 m, and M = 4.0  1024 kg.
 a. 7.8 km/s
  b. 3.5 km/s
  c. 5.4 km/s
  d. 6.9 km/s
  e. 4.8 km/s


Jane

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Reply #1 on: Jul 28, 2018
Answer to Question 1

A

Answer to Question 2

D


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kshipps

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Reply #2 on: Jul 28, 2018
TY


Jane

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Reply #3 on: Jul 28, 2018
You're welcome


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