An object that hangs from the ceiling of a stationary elevator by ...

[Wadzanai]

An object that hangs from the ceiling of a stationary elevator by an ideal spring oscillates with a period T. If the elevator accelerates upward with acceleration 2g, what will be the period of oscillation of the object?
 
  A) 4T
  B) 2T
  C) T
  D) T/2
  E) T/4

Question 2

Two equal-magnitude forces are applied to a door at the doorknob. The first force is applied perpendicular to the door, and the second force is applied at 30 to the plane of the door. Which force exerts the greater torque about the door hinge?
 
  A) the first force (applied perpendicular to the door)
  B) the second force (applied at an angle)
  C) Both forces exert equal non-zero torques.
  D) Both forces exert zero torque.

[alexisweber49]

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[Alejandro Cervera]

Needed this, thank you!