What two things does the strength of the electric force exerted by one object on another charged object depend on?

Initially, a particle is moving at 5.33 m/s at an angle of 37.9° above the horizontal. two seconds later, its velocity is 6.11 m/s at an angle of 54.2° below the horizontal. what was the particle's average acceleration during these 2.00 seconds in the x-direction (enter first) and the y-direction?

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?

Give an example in which the electrical energy changes to light energy