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Author Question: A mass of 355 g hangs from one end of a string that goes over a pulley with a moment of inertia of ... (Read 126 times)

jessicacav

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on: Jul 29, 2018
A mass of 355 g hangs from one end of a string that goes over a pulley with a moment of inertia of 0.0125 kgm2 and a radius of 15.0 cm. A mass of 680 g hangs from the other end.
 
  When the masses are released, the larger mass accelerates downward, the lighter mass accelerates upward, and the pulley turns without the string slipping on the pulley. What is the acceleration of the masses? A) 2.00 m/s2
  B) 3.82 m/s2
  C) 2.87 m/s2
  D) 5.74 m/s2
  E) 7.78 m/s2

Question 2

A driver in a 1000 kg car traveling at 20 m/s slams on the brakes and skids to a stop. If the coefficient of friction between the tires and the horizontal road is 0.80, how long will the skid marks be?
 
  A) 26 m
  B) 21 m
  C) 33 m
  D) 24 m


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katara

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

A

Answer to Question 2

A


jessicacav

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Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


katara

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Reply #3 on: Jul 29, 2018
Great! Please up vote :D


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