Charges are of two kinds—negative charges and charges. amounts of both kinds of charges are found in every piece of matter.

While the change in blank will remain the same during a collision, the force needed to bring an object to a stop can be blank if the time if collision is blank

Two 2.0-cm-diameter disks face each other, 1.0 mm apart. they are charged to ±10 nc. what is the electric field strength between the disks? a proton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?

Why does a collision with an airbag cause less damage than a collision with a steering wheel