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Author Question: How fast would a rocket ship have to move to contract to half of its proper length (as observed by a ... (Read 157 times)

beccaep

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on: Jul 29, 2018
How fast would a rocket ship have to move to contract to half of its proper length (as observed by a stationary object)?
 
  A)
 
  0.25c
  B)
 
  0.50c
  C)
 
  0.65c
  D)
 
  0.78c
  E)
 
  0.87c

Question 2

A ball is thrown straight up with a speed of 30 m/s.
 
  (a.) How long does it take the ball to reach the maximum height?
  (b.) What is the maximum height reached by the ball?
  (c.) What is its speed after 4.2 s?


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cassie_ragen

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

E

Answer to Question 2

(a.) 3.1 s
(b.) 46 m
(c.) 11 m/s


beccaep

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Reply #2 on: Jul 29, 2018
Thank you!


cassie_ragen

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Reply #3 on: Jul 29, 2018
Always glad to help...


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