Negative charge -Q is distributed uniformly around a quarter-circle of radius a that lies in the first quadrant with a center of curvature at the origin.

Find the x- and y- components of the net electric field at the origin.

You have been called to testify as an expert witness in a trial involving a head-on collision. car a weighs 1515 lb and was traveling eastward. car b weighs 1125 lb and was traveling westward at 44.0 mph. the cars locked bumpers and slid eastward with their wheels locked for 22.5 ft before stopping. you have measured the coefficient of kinetic friction between the tires and the pavement to be 0.750 . how fast (in miles per hour) was car a traveling just before the collision? (this problem uses english units because they would be used in a u.s. legal proceeding.)

1. a net force of 100 newton’s is applied to a wagon for 5 seconds. this causes the wagon to undergo a change in momentum of

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical