Electric Charges

Oppositely charged particles are attracted to each other, while particles of the same charge feel a repulsion between each other.

As a charged tape nears the skin of someones arm, the force of attraction strengthens. Some strips of tape repel each other, while others attract each other. This observation led to the conclusion of there being more than one type of charge.

Calculations for the forces of gravity in both the x and y directions of a pendulum.

The magnitude of the force attracting or repelling two charged particles is inversely proportional the distance between them.

Our data representing the repulsion between to metal balls of the same charge. The smaller graph, as we can see from the inverse relationship, is a representation of Electric force as a function of the distance of separation.

By newtons third law, the electric force on charged particle 1 due to charged particle 2, by newton's third law, is equal and opposite to the force on particle 2 due to particle 1. Knowing this, and Coulomb's Law (F = kQq/(r*r)), the forces present in an electrically charged system can be defined.

These are the answers to the conclusion section of the lab demonstrating the variations in the electric force due to separation distances. 

As a result of the charges that flow through the belts connecting the silver top with the bottom, the paper feels a repulsion

The ratio between an electric force and the force of gravity on an object results in an amazingly large unitless number. Therefore, the the force of gravity is considered negligible in problems concerning subatomic particles.