# Moving a charge/electrostatic force

• ajmCane22
In summary, the problem is asking for the work done by the electrostatic force on a moving point charge, expressed in joules. The relevant equations are W = Uf-Ui = delta U and k q1*q2/[(1/r2 - 1/r1]. The problem can be solved by using variables instead of numerical values and remembering the relation between electrostatic potential and electric potential energy. The final answer will involve q1, q2, x2, and y2.
ajmCane22

## Homework Statement

A point charge with charge q1 is held stationary at the origin. A second point charge with charge q2 moves from the point (x1,0) to the point (x2,y2).

How much work is done by the electrostatic force on the moving point charge?

Express your answer in joules. Use k for Coulomb's constant (k = 1/4*pi*epsilon.

## Homework Equations

W = Uf-Ui = delta U
k q1*q2/[(1/r2 - 1/r1]

## The Attempt at a Solution

I don't know how to attempt when there are no q values and no r values. Please help.

ajmCane22,

Have you worked through the problem using the variables that you were given? It may seem unnatural at first, but using variables instead of numerical values is good practice, especially for checking your work later on. This exercise appears to help you realize that.

Also, your second relevant equation is not quite right. It might help to remember what the relation between the electrostatic potential and electric potential energy is.

You will have q1, q2, x2 and y2 in your final answer.
You cannot get a numeric answer without knowing the numbers for those variables.

## 1. What is electrostatic force?

Electrostatic force is the force of attraction or repulsion between two electrically charged objects. It is caused by the interaction of the electric fields generated by the charges.

## 2. How is electrostatic force different from other types of force?

Unlike other types of force, such as gravity or friction, electrostatic force is a non-contact force. This means that objects do not need to be in physical contact for the force to act between them.

## 3. How is electrostatic force affected by the distance between charges?

The strength of electrostatic force is inversely proportional to the square of the distance between charges. This means that as the distance between charges increases, the electrostatic force decreases.

## 4. How can electrostatic force be used in everyday life?

Electrostatic force is used in many everyday objects, such as electronic devices, air purifiers, and printers. It is also used in industrial processes, such as painting and dust removal.

## 5. How does moving a charge affect electrostatic force?

When a charge is moved, its electric field also changes. This can cause a change in the strength and direction of electrostatic force acting on other charges in the vicinity. Additionally, a moving charge can generate a magnetic field, which can interact with other charges and affect the overall electrostatic force.

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