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### Course: Middle school physics>Unit 2

Lesson 3: Electric forces

# Electric forces

Review your understanding of electric forces in this free article aligned to NGSS standards.

## Key points:

• An electric force exists between any two objects with electric charge—even if the objects aren’t touching.
• Electric forces can be attractive or repulsive. This depends on the electric charges of the objects.
• Objects with opposite charges attract.
• Objects with the same charge repel.
• The electric force between two objects depends on the size of their charges and the distance between them. The greater the charges and the smaller the distance, the larger the electric force.

## Want to join the conversation?

• We need some Minecraft education mode in Khan Academy
• and gt7(gran turismo 7)
• why is it that when you slide down a slide or get out of a car and then touch something or someone you get shocked?how does this happen?
• it's called static electricity ,
static electricity is when your hand (or something else ) builds up electricity and all of it gets released at once when you touch something metal
i know this is a very cheesy ending but
have a nice day
• Does a - and a - attract?
• nope. they repel
same charges repel
• how does this happen
• (written by AI): Electrical forces occur due to the interaction of charged particles, such as electrons and protons. These charged particles exert forces on each other based on their charges and the distance between them.

The fundamental property responsible for electrical forces is electric charge. Electric charge can be positive or negative. Like charges (positive-positive or negative-negative) repel each other, while opposite charges (positive-negative) attract each other.

The interaction between charged particles is mediated by the electric field. An electric field surrounds any charged particle and exerts a force on other charged particles within its influence. When a charged particle enters the electric field of another charged particle, it experiences a force due to the interaction of the electric fields.

According to Coulomb's law, the strength of the electrical force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. Mathematically, the electric force (F) between two charged particles can be expressed as F = k * (q1 * q2) / r^2, where q1 and q2 are the charges of the particles, r is the distance between them, and k is the electrostatic constant.

Electrical forces are responsible for various phenomena in our daily lives, such as the attraction or repulsion of magnets, the flow of electric current in wires, and the behavior of charged particles in electric fields. They play a crucial role in understanding and explaining the behavior of charged particles and the functioning of electrical devices.
• Is the letter W and M attracted?
• Please avoid commenting stuff like this in the "questions" forum. This area is where scientific and related questions are meant to be answered, please don't use it as your own personal commenting section. (questions like these may be taken offensively, so please keep these comments to yourself.)
• Can a positive be attracted to another positive and if so, would it have the same logic with the negative charge?
• only '*opposites*attract!'
(1 vote)
• wait we have magnets that have positive and negative charges what would happen if they were both neutral would they stick together anymore if someone know that answer to this pls tell me this is facinating
• don't confuse yourself between magnetic forces and electric forces. in magnets you can't make them neutral because the magnetic field of the magnet exerts the force. over here in electric forces its the force between charges. if you want you can remove the magnetic field of a few magnets by various methods but then it wont stick to anything.