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Author Question: A car needs to generate in order to maintain a constant velocity of on a flat road. What is the ... (Read 81 times)

strangeaffliction

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on: Jul 29, 2018
A car needs to generate in order to maintain a constant velocity of on a flat road. What is the magnitude of the total resistive force acting on the car (due to friction, air resistance, etc.)? (1 hp = 746 W)
 
  A) 2.05  103 N
  B) 2.75 N
  C) 1.03  103 N
  D) 2.87  103 N

Question 2

How long will it take a 7.08 hp motor to lift a 250 kg beam directly upward at constant velocity from the ground to a height of 45.0 m? Assume frictional forces are negligible. (1 hp = 746 W)
 
  A) 20.9 s
  B) 1.56  104 s
  C) 2.18  104 s
  D) 39.7 s


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morrie123456

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

Answer: A

Answer to Question 2

Answer: A


strangeaffliction

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Reply 2 on: Jul 29, 2018
Wow, this really help

scottmt

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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