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Author Question: A boxcar of mass 200 tons at rest becomes uncoupled on a 1.5 grade. If the track is considered to be ... (Read 33 times)

penza

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on: Jul 28, 2018
A boxcar of mass 200 tons at rest becomes uncoupled on a 1.5 grade. If the track is considered to be frictionless, what speed does the boxcar have after 10 seconds?
 a. 0.37 m/s
  c. 2.6 m/s
  b. 0.59 m/s
  d. 4.3 m/s

Question 2

As I pull a rope connected to a box at constant speed up a frictionless slope, pulling parallel to the slope, the tension in the rope will be:
 a. greater than the tension would be if the box were stationary.
  b. greater than the weight of the box.
  c. equal to the weight of the box.
  d. less than the weight of the box.


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whitcassie

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

C

Answer to Question 2

D


penza

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Reply #2 on: Jul 28, 2018
Thank you!


whitcassie

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Reply #3 on: Jul 28, 2018
Always glad to help...


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