1) A planet Y is moving in circular orbit around the Sun. If its distance from the Sun is four times the average distance of the Earth from the Sun, what is the Y’s period in Earth years?     3     8     16     32     64 a) Two masses are precisely 1 m apart from each other. The gravitational force each exerts on the other is exactly 1 N. If the masses are identical, what is each mass?     1.22 x 105 kg     1.34 x 1010 kg     2.50 x 105 kg     1.58 x 1010 kg b) What is the acceleration due to gravity on the surface of the planet Pluto if its mass is 1.2 x 10 22 kg and radius is 1.14 x 10 6 m?     9.8 m/s2     6.4 m/s2     0.62 m/s2     0.34 m/s2

Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter7: Gravity
Section: Chapter Questions
Problem 15PQ: When Sedna was discovered in 2003, it was the most distant object known to orbit the Sun. Currently,...
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Please answer the question and subquestions entirely. This is one single question. According to the official guideline, I can ask two subquestions! Thank you!

 

1)

A planet Y is moving in circular orbit around the Sun. If its distance from the Sun is four times the average distance of the Earth from the Sun, what is the Y’s period in Earth years?
   
3
   
8
   
16
   
32
   
64

a)

Two masses are precisely 1 m apart from each other. The gravitational force each exerts on the other is exactly 1 N. If the masses are identical, what is each mass?
   
1.22 x 105 kg
   
1.34 x 1010 kg
   
2.50 x 105 kg
   
1.58 x 1010 kg

b)

What is the acceleration due to gravity on the surface of the planet Pluto if its mass is 1.2 x 10 22 kg and radius is 1.14 x 10 6 m?
   
9.8 m/s2
   
6.4 m/s2
   
0.62 m/s2
   
0.34 m/s2
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