What effect does friction have on a moving object? i forgot this pls tyy
a. it causes the moving object to speed up.
b. it causes the moving object to slow and eventually stop.
c. it causes the moving object to turn around and move in the opposite direction.
d. it keeps the moving object moving in the same direction forever.

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.