I think it’s answer 1 to separate senators fr om the whims or the general public
distance is metres in any direction ... displacement is distance in a given direction ... 1 mile versus 1 mile North
Added potential energy = (mass) x (gravity) x (height)
or
Added potential energy = (weight) x (added height)
If you need to lift a 15N box 3m straight up, you have to increase its potential energy by (15 N) x (3 m) = 45 Joules .
Where is that added potential energy supposed to come from ? You could use an electric winch, a steam engine, a gasoline-powered motor, thousands of hamsters running on little treadmills that are are connected to the main pulley somehow, or your own arm muscles. But howEVER you do it, you have to provide <em>45 Joules</em> of WORK in order to increase the potential energy of the box by just that much.
The answer would be a nail rusting, but really it could be any of these.
Ohms law = v= Ir
V= 0.02 x 4000 = 80v
