Explain Electric Potential: A Positive Charge

[numbb]

"A positive point charge, when subjected to electric force only, tends to move from a region of higher potential towards a region of lower potential while a negative charge moves in the opposite way."
I don't understand this statement. Can someone explain it to me?

 

[K^2]

Picture potential as a hill. Put a marble somewhere. It rolls downhill. That's basically how this tells you the positive charge will behave. Negative charge will move in the opposite direction.

 

[numbb]

but why would negative charge move in the opposite direction??

 

[jtbell]

For a given electric field (and potential), the electric force is in opposite directions on positive and negative charges.