Electricity – Lesson 1 SP5a Develop and use mathematical models

Electricity – Lesson 1 SP5a Develop and use mathematical models and generate diagrams to compare and contrast the electric and gravitational forces between two charged objects.

SP5a Develop and use mathematical models and generate diagrams to compare and contrast the electric and gravitational forces between two charged objects. Inverse Square Law Electrical and Gravitational Forces 1. Gravitational Force Just like objects that have mass exert gravitational forces on each other, objects that are charged will also exert electric forces on each other. The electric force is directly proportional to the charge of the two objects and inversely proportional to the distance between them Electrical and Gravitational Forces 2. Electrical Force Your Task: What is the value of k?

Although there are various similarities between electrostatic force and gravitational force like 1.Both are conservative. 2.Both these forces follow Newton's third law(make action reaction pair). 3.Have 1/r 2 dependence. 4.Are Central forces. There are various differences as well 5.Gravitational force is independent of the medium between the masses. Electrostatic force whereas depends on the material between the charges 6.Gravitational force is always attractive whereas electrostatic force may be both attractive as well as repulsive. 7.In any system containing masses gravitational force is always present but electrostatic force may or may not be present. 8.The magnitude of gravitational force is very small in comparison to the electrostatic force.

Determine the Electrical and Gravitational Forces between the following charged bodies Two charged bodies of mass 3.135 x 10 -9 kg and 6.270 x 10 -7 kg and of charges. 2.123 x 10 -34 C and 8.492 x 10 -19 C