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Author Question: A rocket has an exhaust speed of 2.5 103 m/s, and produces 7.5 105 N of instantaneous thrust. What ... (Read 70 times)

Yolanda

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on: Jul 28, 2018
A rocket has an exhaust speed of 2.5  103 m/s, and produces 7.5  105 N of instantaneous thrust. What mass of fuel does the rocket burn each second?
 a. 3.30  103 kg/s
  b. 17.1 kg/s
  c. 300 kg/s
  d. 1.90  109 kg/s

Question 2

A 2 500-kg car moving north collides with a 2 000-kg car moving west. After the collision, the cars stick together and move at an angle of 45 north of west at a speed of 8.0 m/s. What was the initial speed of the 2 500-kg car?
 a. 20 m/s
  b. 10.2 m/s
  c. 14 m/s
  d. 9.3 m/s


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steff9894

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

c

Answer to Question 2

b


Yolanda

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Reply 2 on: Jul 28, 2018
YES! Correct, THANKS for helping me on my review

xiazhe

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Reply 3 on: Yesterday
Gracias!

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