If the electric field is 12 V/m in the positive x-direction, what ...

[future617RT]

If the electric field is 12 V/m in the positive x-direction, what is the potential difference between the origin, (0, 0), and the point (3.0 m, 4.0 m)?
 
  A)
 
  48 V with the origin at the higher potential
  B)
 
  48 V with the origin at the lower potential
  C)
 
  36 V with the origin at the lower potential
  D)
 
  36 V with the origin at the higher potential
  E)
 
  cannot be determined

Question 2

An Olympic athlete throws a javelin at four different angles above the horizontal, each with the same speed: 30, 40, 60, and 80. Which two throws cause the javelin to land the same distance away?
 
  A)
 
  30 and 80
 
  B)
 
  40 and 60
 
  C)
 
  30 and 40
 
  D)
 
  40 and 80
 
  E)
 
  30 and 60

[robbielu01]

Answer to Question 1

D

Answer to Question 2

E