Electrial force, Coulomb's Law

 Here we rubbed a balloon with a piece of fur. The balloon sticks due to the electrons it took from the fur. These extra electrons create a force towards the glass that is equal but opposite to the normal force.

 After putting pieces of tape onto the table, we took them off and placed them towards another. They repelled one another.

  Just like mass has forces between them, charges have forces between them. That is what we are illustrating with the above equations. A key difference is that the force can be negative or positive for charges, where as it is only positive for gravity. The 2nd equation from the top is called Coulomb's Law, and is used to measure the electrical force between two point charges

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In the above two pictures we made a graph measuring force and used relationships to solver for the charge

 Here we had two seperate charges, q1 and q2, separated by a distance r. We used Coulomb's Law to solver for the force between them.

 

Just like above, we used Coulomb's Law to solve a problem, but did so in the x and y planes.

 

Here we use a device that transports electrons to the top, thus transporting its' excess electrons out of the top

  

Here electrons are shooting to the blades of the propellers. The propeller are moving due to the combined velocity of the electrons.

 

Here the excess electrons get transported to the hair strands. Now that the strands have the same negative charge, the repel from each other as seen in the picture.