# A charge of #-1 C# is at the origin. How much energy would be applied to or released from a # -1 C# charge if it is moved from # ( -1, 3 ) # to #(-9 ,7 ) #?

##### 1 Answer

Jan 28, 2018

#### Answer:

The energy needed is

#### Explanation:

The potential energy is

The charge

The charge

The Coulomb's constant is

The distance

The distance

Therefore,

The energy needed is