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Author Question: An aircraft weighs 1,500 N, its mass is a. 1,500 kg. b. 750 kg. c. 153 kg. d. mass cannot be ... (Read 81 times)

urbanoutfitters

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on: Jul 29, 2018
An aircraft weighs 1,500 N, its mass is
 a. 1,500 kg. b. 750 kg.
  c. 153 kg. d. mass cannot be determined

Question 2

Starting from rest, a 20,000-kg aircraft being launched from an aircraft carrier goes from 0 to 90 m/s in 2 seconds. The net force acting on the aircraft is
 a. 3,600,000 N. b. 1,800,000 N.
  c. 900,000 N. d. 450,000 N.
  e. 275,000 N.


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lin77x

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

c
RATIONALE: m = w/g = 1500 kg m/s2 / 9.8 m/s2 = 153.06 kg

Answer to Question 2

c
RATIONALE: F = ma; a = change in velocity/change in time = 90 m/s / 2 seconds = 45 m/s2 F = 20,000 kg x 45 m/s2 = 900,000 N


urbanoutfitters

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


lin77x

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


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