A point particle of mass m is moving with a constant speed along a straight line that passes through point P. What can you say about the angular momentum of the particle relative to point P? (a) Its magnitude is mv. (b) Its magnitude is zero. (c) Its magnitude changes sign as the particle passes through point P. (d) Its magnitude increases as the particle approaches point P.
Electricity is a word that describes a wide range of phenomena, from lightning to what keeps atoms together. In most cases that we observe electricity, it is due to electric charges in motion, but first we want to describe electric charge at rest electrostatics. 13.1: Electric Charge Electrostatics is the subject that involves an electric charge that is not moving Electric charge can be positive or negative (two types). o Ex: Nucleus has a positive charge and electrons have a negative charge. An example of electrostatics would be rubbing a balloon against a sweater or hair (where the hair and balloon attract each other because they will have opposite charges). o When you rub one subs