PHYA22H3 Chapter 29: PHYA22 Chapter 29.doc

• School: UTSC
• Department: Physics and Astrophysics
• Course: PHYA22H3
• Professor: Brian Wilson

Document Summary

Potential energy (u): the interaction energy of the system. D r: conservative force: the work done as a particle moves from position i (start) to position f (end) and is independent of the path followed. D ugrav = -wgrav = mgyf mgyi. In a parallel-plate capacitor, the potential energy of a positive charge decreases in the direction of e but the charge gains kinetic energy as it moves toward the negative plate. In a parallel-plate capacitor, the potential energy of a negative charge decreases in the direction opposite to e and the charge gains kinetic energy as it moves away from the negative plate. If a charged particle is projected outward in a uniform field, it gradually slows (kinetic to potential) until reaching the turning point where uelec = emech. If the motion of a particle is always perpendicular to the electric force, the work done on the charged particle is zero.