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Author Question: Two small balls, A and B, attract each other gravitationally with a force of magnitude F. If we now ... (Read 78 times)

robinn137

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on: Jul 29, 2018
Two small balls, A and B, attract each other gravitationally with a force of magnitude F. If we now double both masses and the separation of the balls, what will now be the magnitude of the attractive force on each one?
 
  A) 16F
  B) 8F
  C) 4F
  D) F
  E) F/4

Question 2

A spaceship approaching an asteroid at a speed of 0.60c launches a rocket forward with a speed of 0.40c relative to the spaceship. At what speed is the rocket approaching the asteroid as measured by an astronaut on the asteroid?
 
  A) 0.81c
  B) 1.0c
  C) 0.76c
  D) 0.64c
  E) 0.96c


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blakeserpa

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Reply #1 on: Jul 29, 2018
Answer to Question 1

D

Answer to Question 2

A


robinn137

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Reply #2 on: Jul 29, 2018
Thanks


blakeserpa

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Reply #3 on: Jul 29, 2018
Welcome :)


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