Which of the following cylindrical wires has the largest ...

[jman1234]

Which of the following cylindrical wires has the largest resistance? All wires are made of the same material.
 
  A)
 
  a wire of length L and diameter 2d
  B)
 
  a wire of length L and diameter d/2
  C)
 
  a wire of length L/2 and diameter d
  D)
 
  a wire of length L and diameter d
  E)
 
  a wire of length L/2 and diameter 2d

Question 2

A person pushes on a doorknob with a force of 5.00 N. The direction of the force is at an angle of 20.0 from the perpendicular to the surface of the door. The doorknob is located 0.800 m from axis of the hinges of the door.
 
  The door begins to rotate with an angular acceleration of 2.00 rad/s2. What is the moment of inertia of the door about the hinges? A)
 
  4.28 kgm2
 
  B)
 
  7.52 kgm2
 
  C)
 
  1.88 kgm2
 
  D)
 
  0.684 kgm2
 
  E)
 
  2.74 kgm2

[Sarahjh]

Answer to Question 1

B

Answer to Question 2

C

[jman1234]

Excellent

[amcvicar]

Great answer, keep it coming