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Author Question: A spaceship of mass m1 circles a planet (mass = m2) in an orbit of radius r. How much energy is ... (Read 163 times)

Cooldude101

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on: Jul 28, 2018
A spaceship of mass m1 circles a planet (mass = m2) in an orbit of radius r. How much energy is required to transfer the spaceship to a circular orbit of radius 3R?
 a. Gm1m2/(2r)
  b. Gm1m2/(3r)
 c. Gm1m2/(4r)
 d. Gm1m2/(6r)
 e. 3Gm1m2/(4r)

Question 2

What is the gravitational force on a 20-kg satellite circling the Earth (radius = 6.4  106 m, mass = 6.0  1024 kg) with a period of 5.0 h?
 a. 88 N
  b. 55 N
  c. 36 N
  d. 98 N
  e. 18 N


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triiciiaa

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

b

Answer to Question 2

c


Cooldude101

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Reply 2 on: Jul 28, 2018
Wow, this really help

jackie

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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