Two spaceships are traveling through space at 0.60 c relative to ...

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Two spaceships are traveling through space at 0.60 c relative to the Earth. If the ships are headed directly toward each other, what is their approach velocity, as measured by a person on either craft?
 
  A)
 
  4.2c
  B)
 
  1.2c
  C)
 
  c
  D)
 
  0.60c
  E)
 
  none of the given answers

Question 2

How much work is required to move a charge from one location on an equipotential to another point on the same equipotential? Explain.
 
  What will be an ideal response?

[chem1s3]

Answer to Question 1

E

Answer to Question 2

Zero. The electric field is perpendicular to an equipotential, therefore the work done in moving along an equipotential is zero.

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TY

[chem1s3]

You're welcome