LU LIU 10.DW]
13. Two point charges are located at two of the vertices of a right triangle, as shown in the Figure
16.4. If a third charge -2q is brought from infinity and placed at the third vertex, what will its
electric potential energy be? Use the following values: a = 0.16 m; b = 0.45 m, and q = 2.0 x 10-5
C.
[-17 J]​

Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.