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Author Question: The escape speed from the surface of the Earth is 11.2 km/s. Estimate the escape speed for a ... (Read 106 times)

ss2343

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on: Jul 28, 2018
The escape speed from the surface of the Earth is 11.2 km/s. Estimate the escape speed for a spacecraft from the surface of the Moon. The Moon has a mass 1/81 that of Earth and a radius 0.25 that of Earth.
 a. 2.5 km/s
  b. 4.0 km/s
  c. 5.6 km/s
  d. 8.7 km/s

Question 2

If the mass of Mars is 0.107 times that of Earth, and its radius is 0.530 that of Earth, estimate the gravitational acceleration g at the surface of Mars. (gearth = 9.80 m/s2)
 a. 2.20 m/s2
  b. 3.73 m/s2
  c. 4.20 m/s2
  d. 5.50 m/s2


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raenoj

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

a

Answer to Question 2

b


ss2343

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Reply 2 on: Jul 28, 2018
Excellent

aliotak

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

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