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Author Question: A rocket with initial mass of 3.0 104 kg fires its engines at t = 0 . The exhaust speed of the ... (Read 122 times)

xclash

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on: Jul 28, 2018
A rocket with initial mass of 3.0  104 kg fires its engines at t = 0 . The exhaust speed of the rocket is 3.9  103 m/s. If the velocity of the rocket at t = 200 s is 1 500 m/s, how much fuel did it consume?
 a. 9.6  103 kg
  b. 3.0  104 kg
  c. 4.4  104 kg
  d. 4.8  103 kg

Question 2

A satellite engine has an exhaust speed of 2.80  104 m/s and ejects ionized gas at a rate of 2.50  106 kg/s. What is the instantaneous thrust of the engine?
 a. 8.93  1011 N
  b. 7.00  102 N
 c. 5.30  102 N
 d. 1.12  1010 N


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aruss1303

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Reply #1 on: Jul 28, 2018
Answer to Question 1

a

Answer to Question 2

b


xclash

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Reply #2 on: Jul 28, 2018
Thanks


aruss1303

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Reply #3 on: Jul 28, 2018
Welcome :)


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