Rolling without slipping depends on A) kinetic friction ...

[Chelseaamend]

Rolling without slipping depends on
 
  A)
 
  kinetic friction between the rolling object and the ground.
  B)
 
  static friction between the rolling object and the ground.
  C)
 
  normal force between the rolling object and the ground.
  D)
 
  tension between the rolling object and the ground.
  E)
 
  the force of gravity between the rolling object and the earth.

Question 2

A lens is designed to work in the visible, near-infrared, and near-ultraviolet. The best resolution of this lens from a diffraction standpoint is
 
  A) in the near-infrared.
  B) the same for all wavelengths.
  C) in the near-ultraviolet.
  D) indeterminate.
  E) in the visible.

[rekilledagain]

Answer to Question 1

B

Answer to Question 2

C

[Chelseaamend]

Excellent

[xiazhe]

Gracias!