1) Two bodies, masses m 1 and m 2, are at distance r from each other and attract each other with force F. Find the gravitational force if the distance is doubled.     2F     F/2     F/4     4F A) The weight of a 0.50 kg object on the surface of Planet X is 20 N. If the radius of the planet is 4 x 10 6 m, what is its mass?     3.4 x 1019 kg     2.6 x 1022 kg     9.6 x 1024 kg     2.3 x 1025 kg B) How far from the center of the Earth is the point where the net force of the gravitational attraction of the Earth and the moon is zero? The mass of the moon is 1/81 that of the Earth.     8/9 the way to the moon     9/10 the way to the moon     3/4 the way to the moon     80/81 the way to the moon

Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter11: Gravity, Planetary Orbits, And The Hydrogen Atom
Section: Chapter Questions
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Please answer the question and subquestions completely! This is one whole question which has subquestions! According to the official Bartleby guidelines, each question can have up to two subquestions! Thank you!

 

1)

Two bodies, masses m 1 and m 2, are at distance r from each other and attract each other with force F. Find the gravitational force if the distance is doubled.
   
2F
   
F/2
   
F/4
   
4F

A)

The weight of a 0.50 kg object on the surface of Planet X is 20 N. If the radius of the planet is 4 x 10 6 m, what is its mass?
   
3.4 x 1019 kg
   
2.6 x 1022 kg
   
9.6 x 1024 kg
   
2.3 x 1025 kg

B)

How far from the center of the Earth is the point where the net force of the gravitational attraction of the Earth and the moon is zero? The mass of the moon is 1/81 that of the Earth.
   
8/9 the way to the moon
   
9/10 the way to the moon
   
3/4 the way to the moon
   
80/81 the way to the moon
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