Acar travels 20km southwards an then travel another 20km westward what is the displacement of it rest position

Explanation:

Hey there were trying to find out the displacement we would use the Pythagorean theorem  to find the displacement  a² + b²=c² we know the car goes 20 km south and 20 km west when you draw it out it should look like a triangle, you'll be finding the length of the hypotheses pug in  20² + 20²=c² 400 + 400=c² √800 = √c which gives you

28.28  

hope this helps

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete