A 0.250-kg stone is attached to an ideal spring and undergoes ...

[NClaborn]

A 0.250-kg stone is attached to an ideal spring and undergoes simple harmonic oscillations with a period of 0.640 s. What is the force constant (spring constant) of the spring?
 
  A) 2.45 N/m
  B) 12.1 N/m
  C) 24.1 N/m
  D) 0.102 N/m
  E) 0.610 N/m

Question 2

A 3.00-m-long ladder, weighing 200 N, leans against a smooth vertical wall with its base on a horizontal rough floor, a distance of 1.00 m away from the wall. The ladder is not completely uniform, so its center of gravity is 1.20 m from its base.
 
  What force of friction must the floor exert on the base of the ladder to prevent the ladder from sliding down? A) 93.3 N
  B) 130 N
  C) 28.3 N
  D) 102 N
  E) 150 N

[aadams68]

Answer to Question 1

C

Answer to Question 2

C

[NClaborn]

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[aadams68]

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