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Author Question: When a 100-kg astronaut ejects 0.1 kg of gas at a speed of 50 m/s from her propulsion pistol, her ... (Read 13 times)

Metfan725

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on: Jul 29, 2018
When a 100-kg astronaut ejects 0.1 kg of gas at a speed of 50 m/s from her propulsion pistol, her recoil speed is
 
  A) 50 m/s.
  B) 5.0 m/s.
  C) 0.5 m/s.
  D) 0.05 m/s.

Question 2

A ball is thrown downward from the top of a building with an initial speed of 25 m/s. It strikes the ground after 2.0 s. How high is the building, assuming no air?
 
  A) 20 m
  B) 30 m
  C) 50 m
  D) 70 m


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Cheesycrackers

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

Answer: D

Answer to Question 2

D


Metfan725

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Reply 2 on: Jul 29, 2018
Gracias!

daiying98

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Reply 3 on: Yesterday
Excellent

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