A person weighing 600 N is standing in an elevator. If the upward force of the elevator on the person is 800 N, which of the following is true?

You can decrease the resistance of a length of wire by

If you held a stone over the mouth of a well and then let it go , what would happen to the stone? explain your answer.

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?