2. Jen is playing soccer. She kicks a goal from the 18 line with her left foot. Which law applies?
3. Jen is using her computer. She bumps her mouse. It falls off the desk. Which law applies?
4. Jen goes shopping at the grocery store. She notices that as she adds items to the cart it
gets harder to push. Which law applies?
5. Jay is the defensive tackle on the football team. When he hits the other team's linemen,
he bowls him over backwards. Which law applies?
6. Jay is in the lunch line pushing his tray along the tray ledge. He wants to hurry things,
so he gives his tray a mighty push. John (who is 2 people ahead of Jay) sees his tray fly off
the tray ledge and on to the floor. His buddy, Bits says, "Hey, that is a good example of
11

To understand the behavior of the electric field at the surface of a conductor, and its relationship to surface charge on the conductor. a conductor is placed in an external electrostatic field. the external field is uniform before the conductor is placed within it. the conductor is completely isolated from any source of current or charge. part a: which of the following describes the electric field inside this conductor? it is in the same direction as the original external field.it is in the opposite direction from that of the original external field.it has a direction determined entirely by the charge on its surface.it is always zero. part b: the charge density inside the conductor is: 0non-zero; but uniformnon-zero; non-uniforminfinite part c: assume that at some point just outside the surface of the conductor, the electric field has magnitude e and is directed toward the surface of the conductor. what is the charge density η on the surface of the conductor at that point? express your answer in terms of e and ϵ0