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Author Question: A 2.0-kg ball is moving with a constant speed of 5.0 m/s in a horizontal circle whose diameter is ... (Read 29 times)

Ebrown

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  • Posts: 567
on: Jul 29, 2018
A 2.0-kg ball is moving with a constant speed of 5.0 m/s in a horizontal circle whose diameter is 1.0 m. What is the magnitude of the net force on the ball?
 
  A) 0 N
  B) 20 N
  C) 40 N
  D) 50 N
  E) 100 N

Question 2

A spaceship traveling at 0.50c away from Earth launches a secondary rocket in the forward direction at 0.50c relative to the spaceship. As measured by Earthlings, how fast is the secondary rocket moving away from Earth?
 
  A) 0.90c
  B) 0.50c
  C) 0.80c
  D) 0.70c
  E) c
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joechoochoy

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

E

Answer to Question 2

C


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