Three identical 6.0-kg cubes are placed on a horizontal ...

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Three identical 6.0-kg cubes are placed on a horizontal frictionless surface in contact with one another. The cubes are lined up from left to right and a force is applied to the left side of the left cube causing all three cubes to accelerate to the right at 3.0 m/s2 . What is the magnitude of the force exerted on the right cube by the middle cube in this case?
 a. 12 N
  c. 24 N
  b. 18 N
  d. none of the above

Question 2

Three identical 6.0-kg cubes are placed on a horizontal frictionless surface in contact with one another. The cubes are lined up from left to right and a force is applied to the left side of the left cube causing all three cubes to accelerate to the right at 3.0 m/s2 . What is the magnitude of the force exerted on the middle cube by the left cube in this case?
 a. 18 N
  c. 54 N
  b. 27 N
  d. none of the above

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Answer to Question 1

B

Answer to Question 2

D

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