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Author Question: What factors determine the friction coefficient? A) Surface area, friction material B) Friction ... (Read 210 times)

craiczarry

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on: Jun 23, 2018
What factors determine the friction coefficient?
 
  A) Surface area, friction material B) Friction material, surface area
  C) Friction material, surface finish D) Surface area, surface thickness

Question 2

A 3000 pound vehicle is calculated to have a kinetic energy of 90,000 ft-lb at 28 mph. If the speed of the vehicle remains the same and the weight is doubled to 6000 pounds, what will happen to the calculated kinetic energy?
 
  A) It will increase by the square (x 4), to 360,000 ft-lb.
  B) It will increase proportionally (x 2), to 180,000 ft-lb.
  C) It will remain the same.
  D) None of these are correct.


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livaneabi

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Reply #1 on: Jun 23, 2018
Answer to Question 1

C

Answer to Question 2

B


craiczarry

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Reply #2 on: Jun 23, 2018
Thank you!


livaneabi

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Reply #3 on: Jun 23, 2018
Happy to help


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