A car of mass m goes around a banked curve of radius r with speed ...

[danielfitts88]

A car of mass m goes around a banked curve of radius r with speed v.
 
  If the road is frictionless due to ice, the car can still negotiate the curve if the horizontal component of the normal force on the car from the road is equal in magnitude to A)
 
  mg/2.
 
  B)
 
  mg.
 
  C)
 
  mg sin .
 
  D)
 
  mv2/r.
 
  E)
 
  tanv2/(rg).

Question 2

Materials in which the resistivity becomes essentially zero at very low temperatures are referred to as
 
  A)
 
  conductors.
  B)
 
  insulators.
  C)
 
  semiconductors.
  D)
 
  superconductors.

[gabrielle_lawrence]

Answer to Question 1

D

Answer to Question 2

D