Jake walks to the taco's place for lunch.He walked 1 km east and stopped to pin his location.Then he continued for 2 km west to get to the pizza place.What distance did he cover?What was his displacement?

Distance 3 km, Displacement -1 km west

Explanation:

Assuming he is starting at 0 and walking 1 km east, then walks 2 km west, that would be 1 -2 because he walked in the opposite direction and was 1 kmfrom his staring point.

If some small bits of paper were placed upon a table and the balloon were brought near and held above the paper bits, then the presence of the charged balloon might create a sufficient attraction for the paper bits to raise them off the table. This influence - known as an electric force - occurs even when the charged balloon is held some distance away from the paper bits. The electric force is a non-contact force. Any charged object can exert this force upon other objects - both charged and uncharged objects. One goal of this unit of The Physics Classroom is to understand the nature of the electric force. In this part of Lesson 1, two simple and fundamental statements will be made and explained about the nature of the electric force.

Perhaps you have heard it said so many times that it sounds like a cliché.

Opposites attract. And likes repel.