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Author Question: A miracle car with a 100 efficient engine burns fuel having a 40-megajoules-per-liter energy ... (Read 43 times)

D2AR0N

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  • Posts: 561
on: Jul 29, 2018
A miracle car with a 100 efficient engine burns fuel having a 40-megajoules-per-liter energy content. If air drag and overall frictional forces at highway speeds totals 1000 N, what distance per liter can be achieved on the highway?
 
  A) 30 km
  B) 40 km
  C) 50 km
  D) more than 50 km
  E) need more information

Question 2

A jack system will increase the potential energy of a heavy load by 1000 J with a work input of 2000 J. The efficiency of the jack system is
 
  A) 10.
  B) 20.
  C) 50.
  D) 80.
  E) need more information


vkodali

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  • Posts: 357
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: B

Answer to Question 2

Answer: C


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