After an avalanche, a huge block of stone slid down a mountain and landed in the middle of a road. people in the nearby town had a very difficult time moving it out of the road. the block of stone is difficult to move because a. it has a high amount of momentum. b. has balanced forces acting on it. c. it has a high amount of inertia. d. has unbalanced forces acting on it.

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.