Jimmy needs to run errands for his wife, because a happy wife is a happy life. He starts by heading North to pick up some clothes at 30 miles/hour for 2 hours. He then heads
West for 4 hours at 10 miles/hour to get her fancy makeup. He needs to get his hair cut
for his date tonight, so he heads South at -20 miles/hour for 3 hours. He needs to pick
up dinner at a restaurant, so he heads 40 miles/hour East for 1 hour. Finally, he needs to
pick up flowers, so he heads back North for 25 miles/hour for 2 hours. Where did Jimmy
end up relative to his starting location?

Your physics assignment is to figure out a way to use electricity to launch a small 6.0-cm-long plastic drink stirrer. you decide that you'll charge the little plastic rod by rubbing it with fur, then hold it near a long, charged wire, as shown in figure p23.56 . when you let go, the electric force of the wire on the plastic rod will shoot it away. suppose you can uniformly charge the plastic stirrer to 10 nc and that the linear charge density of the long wire is 1.0 x10-7 c/m. what is the net electric force on the plastic stirrer if the end closest to the wire is 2.0 cm away?