A point on the rim of a rotating wheel has nonzero acceleration, since its moving in a circular path. Does it necessarily follow that the wheel is undergoing angular acceleration?
Goals • To study electric charge and charge conservation • To see how objects become charged • To calculate the electric force between objects using Coulomb’s law • To learn the distinction between electric force and electric field • To calculate the electric field due to many charges • To visualize and interpret electric fields Introduction • Water makes life possible as a solvent for biological molecules. What electrical properties allow it to do this • We now begin our study of electromagnetism, one of the four fundamental forces. • We start with electric charge and look at electric fields. Electric charge • Two positive or two negative charges repel each other. • A positive charge and a negative charge attract each other.