Warm-up(Own Paper!!) What is kinetic energy? It is the energy due to motion or the energy of moving objects. What happens to kinetic energy when a ball is thrown up into the air. Gravity converts the kinetic energy into potential energy.
Warm- Up Where is the force of gravity directed? Down What is the acceleration due to gravity? 9.8 m/s2 What are the two types of charge? Positive & Negative
8-1: Electric Charge Analyze factors that affect the strength and direction of electric forces and fields. Describehow electric forces and fields affect electric charges. Describe how electric charges are transferred and explain why electric discharges occur.
Electric Charge Electrical energy Energy associated with electrical charges. Electrical charges A property that causes subatomic particles such as protons and electrons to attract and repel each other. Protons – positive Electrons – negative
Charged objects Objects become charged because there is an imbalance of protons and electrons. Positive charge More protons than electrons. Negative charge More electrons than protons. Uncharged Equal numbers of each.
Charging Objects Friction Rubbing two objects together. Balloon on hair, shoes on carpet, etc. Conduction Charge is transferred by contact. Induction A transfer of charge with out physical contact. Conservation of Charge The overall charge in the isolated system remains constant.
Electric forces Like charges repel. Opposite charges attract. The electric force between two objects is directly proportional to the net charge on each object. The electric force is indirectly proportional to the square of the distance between each object.
Electric Fields The space around the electric charge over which the charge exerts a force. Electric field strength depends on: The amount of charge that produces the field. The distance from the charge.
2 Forms of Electricity Static – a build up of charge on an object Current – a steady flow of electrons through a conductor
Conductors and Insulators Insulators: Slow or stop the flow of electrons. Ex. Rubber, Glass, Plastic (the rubber coating on the outside of an electrical cord) Conductors: Allow a free flow of electrons Ex. Metals (the wire inside an electrical cord)
Conclusion Write a short paragraph describing the interactions between charges. Two types of charges The forces between charges Way charges are transferred to and from surfaces.