PHYS 1302W Lecture Notes - Lecture 1: Centripetal Force, Alpha Particle, Charged Particle
Document Summary
Remember, as vectors, combine the components of them separately, to have a vector describing 3 dimensions of motion. Motion of a charged particle in a magnetic field. For q>0, f is always perpendicular to v, so |v| never changes. Magnetic forces do no work on the particle. Circular motion with f providing the needed centripetal force. The force needed to keep an object of mass m moving at speed v in a circle of radius r is. This will not be on the formula sheet, we are expected to derive it. An alpha particle (q=+2e, m=4. 003u) is released by a radon nucleus in a direction perpendicular to the earths 0. 45gauss magnetic field. If the velocity of a charged particle has components both parallel and perpendicular to b, it can be written. Then the particle will move in a helix with radius.
