A small sphere carries a charge of 120microcoloumb calculate the magnitude and direction of a force which it exerts on a second small sphere carrying a charge of - 300 microcoloumb if the distance between them is 30

the independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.

the dependent variable, the one that you measure the response in, is the distance that the washers travel.

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement

the components of a vector are the parts of the vectors that are to each other.

b perpendicular